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How to Master Physics for Jee(Main +Adv.) ZEYAUL MUSTAFA Education   Physics, the subject -The Subject which tells us about the occurrence of natural phenomenon all around in our nature. This is the definition of Physics, but let me take you little deeper and introduce you with the conceptual implication of Physics. In reality, life keeps revolving around Physics. Let me tell you how? Suppose, we are sleeping on bed then what is happening actually, your weight is being balanced by the normal reaction provided by your bed. For example, when you are walking, then Physics comes to play as Newton's 3rd law of motion comes into action. The ceiling fan revolving shows us the Rotational Motion in it. The pendulum doing SHM, Water flowing through the tap shows steady flow of water and lot more to mention. So, we can say that whatever is happening around us can be related with Physics. But why am I mentioning all this? Because in order to master Physics, you have to understand it first. So, the very first mantra to excel in physics is to understand it deeply. Don't rely on memorizing formulas, rather always try to understand the concepts.   How to Proceed with the texts?   1.First of all start with DC Pandey’s book for theory part. 2.Then Start Solving HC Verma's each and every questions. 3. Come back to DC Pandey and cover its questions. 4.Then specifically for JEE Advanced, Start solving IE Irodov(It would be a tough nut to crack initially, but don't worry its tough for everyone). Effective Revision Technique Things once learnt and if not revised immediately, you will forget. It can clearly be seen with the given curve.  Hence its very essential for us to revise whatever we have learnt. Importance of Test Series and practicing numericals.  One should keep in mind that JEE is an objective exam, so you must have to prepare accordingly...  In order to do that, firstly you should practice numericals in a time bound manner. Set the timer for 30 minutes and solve 15 questions, giving 2 minutes per question. One should try to give the test as soon as he/she finishes the chapter. Most importantly, after completing the test 'Analysis' is a must. Now the question is how to do analysis of the given test. I am providing you the steps which you have to follow: -​ ​​​​​​Check what are your mistakes.  Note down the concepts in which you have made mistakes and then focus on those concepts. Keep a note of it for last time revision before exams.    Most Important Topics to cover” 1.Mechanics- In Mechanics try to focus more on friction, Work Power and Energy Rotation and Fluid Mechanics.  2.SHM and Waves- Cover this entire portion, generally questions are of moderate level in JEE.  3.Heat and Thermodynamics- It's extremely important and easy as well, all you have to do is to revise it again and again...  4.Electromagnetism- The topics such as Electrostatics, Capacitor, EMI and AC should be focused more.  5.Optics- Its also an easy one, just proper understanding of concepts are required to master it.  6.Modern Physics - It is a very scoring topic and every year 4 to 5 questions are always there in JEE Main and also in Advanced question paper. So in modern physics, focus more on semiconductor and communication System. Below I have given chapter wise distribution of questions in JEE (Main+ Adv.)..* *Its just a rough distribution, not exact one but I have given so that you can have some idea, subject to change. Some Study Tricks for JEE: - 1. Always make your hand-written short notes of each chapter, which will be extremely helpful for revision.  2.Use notes to memorise facts and formulas. Keep a written note of what you want to memorise and keep it in front of your study table so that you can see frequently. 3.Try to study using 'Pomodoro Technique' Now let me explain, what actually it is...Set the timer for 25 min and study with full focus leaving behind all distractions and then after 25 mins take a 5 minute break then again take one Pomodoro (25 minutes session is called a Pomodoro). So studying in this way will increase your standard of answering questions very effectively.  4.Don't keep any doubt in mind just be clear with your concepts. 5.  Take your tests seriously like your finals. Wishing you all, best of luck for your preparations and the final Exam. Eat Healthy, Sleep well, don't take stress, keep calm and keep practicing...   Best Books for Jee (Main+Adv.) 1.Dc Pandey- (All parts) 2.Hc Verma - Vol- 1,2 3.Ncert Exemplar 4.I.E Irodov(Only for Jee Adv.)   2018-12-20 07:14:40 Edit Delete
Bye-Bye Exam Blues!! Dr. Sayantani Bhattacharjee Education With exams knocking at the doorstep, most of the students will be seen suffering from anxiety and stress related symptoms. These can range from common signs such as irritability, sleeplessness and poor appetite to more alarming problems of depression, panic attacks and even suicidal tendencies. As parents and teachers, it is absolutely essential to recognize that every student is a unique individual and has his/her own thresholds of coping with stress. Here are some significant warning signs that should help one recognize the possibility that your child/student is under tremendous stress:- Continuously refusing to eat or engaging in binge eating suddenly Complains of frequent headaches, indigestion and loose motions Feels dizzy, breathless and has sweaty hands and feet Demonstrates repetition of a certain behaviour out of fear of loss Has nightmares portraying negative thoughts and apprehensions of failure It is essential to understand that everyone undergoes stressful times in life. But knowing ways to cope with it helps one being confident and efficient at such times. Here are a few tips: - Eat Right! Say no to foods that are rich in sugar and fat. Instead include whole grains, fruits and veggies in your diet. Avoid caffeine and alcohol. Drink at least 8-10 glasses of water in a day. Take short breaks from studies every 30-45 minutes. This helps relax your eyes and refreshes your mind for the next study period. Take a stroll during this break. Exercise helps in concentration and keeps you energetic. Speak to friends and/or family when you are stressed. Sharing your thoughts helps to relieve stress to a large extent. Get adequate sleep during exam times. This helps you with a good memory and a fit body. Meditate for 10-15 minutes at least in a day. This doesn’t need you to sit in a prayer position really. Even listening to music or reading a book you like can have equally beneficial effects on your mind and body as practicing meditation in the usual way would. Think Positive! Visualize success in everything that you are going to do. Imagine that you can answer all questions in the exam and that you feel confident being the way you are.   About the Author Dr. Sayantani Bhattacharjee is a medical professional with over 14 years of experience. She is passionate about providing comprehensive medical service to people living in remote, difficult to reach areas. She is also a travel freak and an avid reader. 2018-12-20 07:14:40 Edit Delete
An Expert Speaks SOURAVI CHAKRABORTY Education Dear Students, With the examinations approaching, you all are trying to concentrate and put in your hard labor to excel. Here are few tips to improve and take care of your preparation keeping in view that no time is wasted. Get started: if your understanding of the subject matter is doubt-free, it is time to start revision A planned revision: the topic that you want to study and the number of days you want to take for the revision of the same should be pre planned Written practice: in all subject’s plan for solving papers. More papers you solve, more is the confidence in you Regular timings: study according to a fixed time table that you should plan out before. Do take breaks but not too many Get your doubts cleared: keep a written note of it and do not allow it to pile up Your text books are the best ones: avoid studying from guides, help books and similar other books Study thoroughly: each topic should be studied along with its pictorial presentation like maps, charts, diagrams, tables etc Avoid rote learning: without understanding it is difficult to learn as it might not help Check your earlier test papers: see the mistakes you have committed earlier and make sure that they are not repeated Do not go by the saying that only study and no play makes Jack a dull boy: it is time to study and give all your efforts and concentration towards it. Wishing you all the best About the author Souravi Chakraborty is a distinguished pedagogue who has the experience of teaching at various schools across the country for over three decades. She started her career as a teacher of classes XI and XII at the Mahadevi Birla Girls’ Higher Secondary School, Kolkata. She was the Head of the Department of History at Lady Irwin Senior Secondary School, New Delhi from 1993 to 2000. She became the Principal of O.P. Jindal Vidya Niketan School in Bhuj (Gujarat) in 2010. She has also worked as Senior Resource Teacher for the curriculum support package initiated by the Hindustan Times, and as consultant for the Newspapers in Education (NIE) Project of the Times of India. 2018-12-20 07:14:40 Edit Delete
AIIMS 2019 VAISHALI AGARWAL Education AIIMS 2019 AIIMS is a national level entrance examination for admission in MBBS course in the most prestigious college of India – AIIMS located in 15 cities currently. Approximately 3 to 4 lacs students every year take up this exam. This year, NEET-UG will be conducted by AIIMS, New Delhi on 25th and 26th????, 2019. The mode of exam is online, and duration is of three and half hours. The question paper consists of 200 multiple choice questions with 1 mark each rewarded for correct answer and -1/3 given/deducted??????? for each incorrect answer. Subjects that are asked in the paper are Physics, Chemistry and Biology. Syllabus is basically of class 11th and 12th NCERT based mostly on questions of moderate level. There are 60 questions in each section, physics, chemistry and biology with 40 multiple choice questions and 20 assertion reasoning types’ questions from each section and 20 questions from general knowledge section. SUBJECT NUMBER OF QUESTIONS MAXIMUM MARKS A. PHYSICS 60 60 B. CHEMISTRY 60 60 C. BIOLOGY 60 60 D.  GENERAL KNOWLEDGE 20 20   WHAT AFTER AIIMS? This exam selects students from all over the country for admission in most prestigious medical profession. Results of AIIMS are declared in June. Usually there is a cut-off per centage, passing which would make you eligible for attending counselling of MBBS seats in AIIMS. The qualifying percent in NEET-UG 2018 was – CATEGORY QUALIFYING PERCENTAGE GENERAL 50% SC/ST 40% OBC 45% IMPORTANT TOPICSThe results will be published online. Qualification will be based on cut off score. Passing cut-off, you will be called at AIIMS for further counselling procedures. 1. PHYSICS Electrostatics Current and electricity Thermodynamics Optics Photoelectric effect Semiconductors Magnetism 2. CHEMISTRY Coordination compounds Chemical bonding Periodic table p-block Equilibrium Thermodynamics Electrochemistry General organic chemistry   3. BIOLOGY Ecology Genetics and evolution Biological classification Cell and its structure Morphology of flowering plants Reproduction Human physiology Biotechnology   TIPS TO ATTEMPT THE PAPER Firstly, RELAX when you go through the paper for the first time. Relaxation and no stress motto increase efficiency and brings the best out of you. Then, read the paper in one go so that you feel that you are aware of all the questions. Then start with the section that seems to be difficult or lengthy, but you are confident. Most people think physics should be attempted last but that is a myth. Attempting physics first, not only open your mind but also makes you familiar with the paper. In first hour, try to attempt as many physics questions as you can. Then in next one hour do all chemistry and biology questions in one attempt. Leave whatever takes time. Don’t invest much time on a single question. One question isn’t going to select your rank so beware that you don’t stick to one question. In the last hour you may again go through the leftover questions and do whatever you consider to be correct. Assertion???? reasoning requires concentration as they contain problem solving questions. This strategy will not only increase your score but also your efficiency. LAST FOUR MONTHS OF YOUR PREPARATION In the last four months, what is most important is revision and your pattern of revision. What every student must understand is that his/her aim is to clear an MCQ based paper in the subject. So, he should study only what is asked or what can be asked, not everything that is known about any topic. That is why revision should be scheduled such, that it covers all the topics briefly. All the formulas and definitions should be revised every week. Name reactions in organic chemistry and name events???? in biology should be learnt. Preparation for the final day should start right before four months in a way so that whole syllabus is completed and revised in 2-3 days covering 1-2 important questions from each topic. Practise of fast reading should be done. Full syllabus test papers should be solved. Do not wait for the day on which your syllabus is completed. Basically, AIIMS require conceptual study, so try to make your concepts clear. Read NCERT, mostly all the assertion reasoning type questions are a modification of direct contextual form of NCERT text books. Practise mock tests. WHY US? There are several crash courses that may promise you to complete AIIMS syllabus in four months but choosing best should be your wise decision. Choosing this crash course series is benefitting for students. Benefits are many but let’s focus on academic part. Study material provided by our crash course is fully analysed and comprised in such a way that students would have all the knowledge but in a nutshell. The study material of a chapter consists all the essential things that you need to know, along with questions that not only covers your NEET but also boards and AIIMS. All the questions are prepared and checked many times by expert teachers and mentors. Also, the most important benefit of this crash series is that you are with them whose profession has always inspired you. Since some of our experts are from medical field, there is a constant guidance from them. And who knows, one of them might become your senior!! Thank you.     2019-02-09 05:45:41 Edit Delete
NEET 2019 VAISHALI AGARWAL Education NEET-UG 2019 NEET-UG is a national level entrance examination for admission in MBBS and BDS courses in all Medical colleges run by the central and the state governments throughout the country except for AIIMS and JIPMER. Approximately 10 to 12 lacs students every year take up this exam. This year, NEET-UG will be conducted by NTA that is NATIONAL TESTING AGENCY on 5th of May, 2019. The mode of exam is offline and duration is of three hours. The question paper consists of 180 multiple choice questions with 4 marks each rewarded for correct answer and -1???? for each incorrect answer. Subjects tested are Physics, Chemistry and Biology. Syllabus is basically class 11th and 12th NCERT based with mostly questions of moderate level. There are 45 questions each from physics and chemistry and 90 questions from biology. SUBJECT NUMBER OF QUESTIONS MAXIMUM MARKS A. PHYSICS 45 180 B. CHEMISTRY 45 180 C. BIOLOGY 90 360   WHAT AFTER NEET-UG? This exam selects students from all over the country for admission in most prestigious medical profession. Results of NEET-UG are declared in June. Usually there is a cut-off, passing which would make you eligible to attend counselling for over 90,000 seats of MBBS and BDS in government and private colleges of country. There is a provision of 15% quota, in which 15% top meritorious students are selected for admission in all India colleges. Rest are allotted colleges according to 85% state quota. Passing the cut-off does not necessarily entitle for admission in medical or dental colleges. The qualifying percent in NEET-UG 2018 was – CATEGORY QUALIFYING PERCENTAGE GENERAL 50% SC/ST/OBC 40% GENERAL PH 45% The cut-off will be published through NEET-UG online portal along with result. The colleges are then allotted according to merit list formed based on 15% all-India quota and 85% state quota. IMPORTANT TOPICS 1. PHYSICS Modern physics Current and electricity Thermodynamics Optics Semiconductors Magnetism 2. CHEMISTRY Coordination compounds Chemical bonding Equilibrium Thermodynamics Electrochemistry General organic chemistry   3. BIOLOGY Ecology Genetics and evolution Biological classification Cell and its structure Human physiology Biotechnology TIPS TO ATTEMPT PAPER Firstly, RELAX when you read the paper as no stress motto increases efficiency and brings the best out of you. Read the paper in one go so that you are aware of all questions. Then start with section that seems to be difficult or lengthy but has your confidence. Most people think physics should be attempted last but that is a myth. Attempting physics first not only open your mind but also makes you familiar with the paper. In first hour, try to attempt as many physics questions as you can. Then in next one hour do all the chemistry and biology questions in one attempt. Leave whatever takes time. Don’t invest more time in one single question. One question isn’t going to select your rank so make sure that you don’t stick to one question. In the last hour you may again go through the leftover questions and do whatever you consider to be appropriate answers. Solving paper will not only increase your score but also your efficiency if you practice papers in this way. LAST FOUR MONTHS In last four months, what is most important is revision and your pattern of revision. What every student must understand is that his/her aim is to clear an MCQ based paper, not to do Ph.D. in the subject. So he should study only what is asked or what can be asked, not everything that is known about any topic. That is why revision should be scheduled such that it covers all the topics briefly. All the formulas and definitions should be revised every week. Name reactions in organic chemistry and name events ??? in biology should learnt. Preparation for the final day should be started right at four months in a way so that whole syllabus is completed and revised in 2-3 days covering 1-2 important questions of each topic. Practise of fast reading should be done. Full syllabus test papers should be solved. Do not wait for the day on which your syllabus is completed. WHY US? There are several crash courses that may promise you to complete NEET syllabus in four months but choosing best should be your wise decision. Choosing this crash course series is benefiting for student. Benefits are many but let’s focus on academic’s part, then study material provided by our crash course is fully analysed and comprised in such a way that student would have all the knowledge but in a nutshell. The study material of a chapter consists all the essential things that you need to know, along with questions that not only covers your NEET but also board and AIIMS part. All the questions are prepared and checked many times by expert teachers and mentors. Also, the most important benefit of this crash series is that you are with them whose profession has always inspired you. Since some of our experts are from medical field, there is a constant guidance from them and their experience with you right from filling NEET form to taking admission in medical college. And who knows, may be one of them will may become your senior!! Thank you. 2019-02-09 06:09:00 Edit Delete
MOTIVATIONAL RBeI Education It was one seemingly ordinary day when I decided to QUIT… All of a sudden I made a decision to quit my job, my relationship and finally my spirituality. I just wanted to quit my life.   But before that, I went to the wood to have one last talk with God.   I started: “God, can you give me one good reason not to quit?”   His answer really surprised me: “Look around”, He said. “Do you see the fern and the bamboo?”   I replied: “Yes. When I planted the fern and the bamboo seeds, I took very good care of them. I gave them light. I gave them water. The fern quickly grew from the earth.   Its brilliant green covered the floor. Yet nothing came from the bamboo seed. But I did not quit on the bamboo. In the second year the Fern grew more vibrant and plentiful.   But still, nothing came from the bamboo seed. But I did not quit on the bamboo.   He said: “In year three there was still nothing from the bamboo seed. But I would not quit.   In year four, again, there was nothing from the bamboo seed. I would not quit.” “Then in the fifth year a tiny sprout emerged from the earth. Compared to the fern it was seemingly small and insignificant…But just 6 months later the bamboo rose to over 100 feet tall.   It had spent the five years growing roots. Those roots made it strong and gave it what it needed to survive. I would not give any of my creations a challenge it could not handle.”   After that, He asked me: “Did you know, my child, that all this time you have been struggling, you have actually been growing roots. I would not quit on the bamboo. I will never quit on you.”   “Don’t compare yourself to others.” He added. ”The bamboo had a different Purpose than the fern. Yet they both make the forest beautiful.” God said to me: “Your time will come”   “You will rise high”.   I asked: “How high should I rise?”   “How high will the bamboo rise?” He also asked.   I was confused: “As high as it can?”   ”Yes.   ” He said, “Give Me glory by rising as high as you can.” After this conversation I left the forest and I wrote this amazing story. I really hope that these words can help you to see that God will never give up on you.   You should Never, Never, Never, Give up.   Don’t tell the Lord how big the problem is, tell the problem how great the Lord is   2018-12-20 07:14:40 Edit Delete
Positivity Shelly Agarwal (SJV Class-11) Education Positive is a mental and emotional attitude that focuses on thinking the brighter side of life and produces positive results. A positive person participates or competes with a healthy mindset and is always successful, happy and smiling but also helps in building skill. Positive emotions like joy, contentment and love remove the obstacles in our life and we are likely to see more possibilities. The biggest benefit of positive thinking is that it makes a person see his/her actual abilities and develop these for later use in life. With a positive attitude we experience pleasant and happy feelings. It has a direct effect on our health and provide us with a huge amount of energy. It enhances our daily behaviour like how we talk, feel and react. A negative person is likely to be narrow minded and focused on negative thoughts. This creating troubles in life. Positive thinking is not very hard to attain. It can be done through a constant and conscious effort of an individual. We might also get effected by someone instinctively and on a subconscious level, through words thoughts or feelings. Positive thinking is a way of living the life with comfort and is 99% effective. People like staying with positive people as they are more trustworthy and helpful. So, to use this weapon in life a person needs more than just to be aware of its existence. He needs to adopt the positivity in everything he does. 2018-12-20 07:14:40 Edit Delete
Gambling Shelly Agarwal (SJV Class-11) Education Gambling is a bad habit. Yet it is an old habit that existed in ancient India. We learn from our epics that the Pandavas and the Kauravas used to gamble. People gamble because they want to get rich quickly. Gambling is a kind of shortcut to riches. Everyone would like to follow an easy way to make money. There are different forms of gambling. Some may gamble with cards or dice, others may play ‘matka’ or bet on horses. Buying lottery tickets and trying cross-word puzzles are other forms of gambling. Some forms of gambling like cards, dice and matka are illicit. Others are permitted by the law. These are cross-word, lotteries and horse racing. Illicit forms of gambling should not be encouraged by people. Even buying lotteries or betting on horses should be done within limits. The disadvantage of gambling is that it becomes a craze. Gamblers neglect their families. They spend all their earnings on gambling. They hardly ever win any money. When they lose money by gambling, they sometimes commit suicide. Many families have been ruined by gambling. So gambling should be avoided. 2018-12-20 07:14:40 Edit Delete
Adrenocorticotropic Hormone Shelly Agarwal-SJV (Class 11) Education Adrenocorticotropic hormone (ACTH) also called corticotropin or adrenocorticotropin, a polypeptide hormone formed in the pituitary gland that regulates the activity of the outer region or cortex of the Adrenal glands. In mammals the action of ACTH is limited to those areas of the adrenal cortex in which the glucocorticoid hormones- cortisol and corticosterone are secreted. The secretion of ACTH is itself is regulated by another polypeptide, Corticotropin-releasing hormone (CRH), which is discharged from the hypothalamus in the brain in response to impulse transmitted by the nervous system. ACTH is a segment of much larger glycoprotein prohormone molecule called proopiomelanocortin(POMC). POMC is synthesised by the corticotrophs of the anterior pituitary, which constitute about 10% of the gland.the molecule is split into several biologically active polypeptides when the secretory granules are discharged of the corticotrophs. Among these polypeptides is ACTH, whose major action is to stimulate the growth and secretion of the cells of the adrenal cortex. In addition, the hormone causes an increase in skin pigmentation. Other polypeptides derived from POMC include Melanocyte Stimulating Hormone(alpha and beta melanotropin), which increases skin pigmentation; beta- lipoprotein, which stimulates the release of fatty acids from adipose tissue; a small fragment of ACTH, which is thought to improve memory; and beta endorphin which suppresses pain. Increased secretion of ACTH due to corticotroph tumor or corticotroph hyperplasia causes adrenocortical hyperfunction, whuch in turn causes the constellation of symptoms and signs called Cushing syndrome. ACTH deficiency can occur as a part of a multiple pituitary hormone deficiency syndrome or as an isolated deficiency. 2018-12-20 07:14:40 Edit Delete
Habit of Reading Shelly Agarwal (SJV Class-11) Education Introduction:           Reading is one of the most important and best habit one can inculcate. Those who have the habit of reading are actually the ones who can really understand the value pleasure and value of reading. There are very few who are aware of the advantages of reading good books.             Importance of good reading habits:             Reading habits develop vivid imagination, knowledge and vocabulary. Here are some points describing importance of good reading habits: The most important reason of reading is that we gain knowledge. Books are a rich source of information and knowledge. It is a proven fact that those who have a good reading habit show signs of higher intelligence. With diverse and bountiful genres books open up the mind and enhance the creative ability and language skills. Reading fiction develops empathy and helps build better relations with others. You become a part of story and naturally empathize and sympathize with the characters. You become more aware about how people get in different situations Good reading also inspires you to write. Many writers get inspired and gain expertise by reading more and more. You learn the art of using language and enjoy playing with words.                    Conclusion: There are many perks of good reading habits. It keeps our mind active strong and health habits. It keeps our mind active , strong and healthy. Reading is important for overall personal growth and development. Besides, you never feel bored or lonely if you develop good reading habits. 2018-12-20 07:14:40 Edit Delete
Chunk of me Sushmita Education I'm allure and life        in a cadaver of mine. No hopes,no lies,no cries     a single smile brings me alive. I'm touch to be felt        a heart to be melt. A sorrow to gleam        A morrow to lean. This is the story of me,    A girl who knows how to see.   I embrace the glory of the world, I embrace the  gleam of the vein, I embrace the beauty of the serenity, I embrace the charm which has no harm. I embrace the mercy with no pain.   No dependency on corpse of bygone, No dependency on mortals I meet, No dependency on deets I get, No dependency on sorrow I chase, No dependency on reproval I sustain, Only dependency I maintain        Is composure.   Sushmita B.Tech + M.tech cognitive and neuroscience from Amity University Rajasthan 2018-12-20 07:14:40 Edit Delete
Chemistry Class 10 ICSE Important questions RBeI Education What are the elements of group 17 called? Name the group 17 element which is solid Give reason Inert gases have Zero valency Give reason the atomic size increases as we move down the group. Give reason Sodium chloride forms ionic bond. Difference between Conductor and Electrolysis Define Electrolysis. State the 5 chemical difference between metals and Non-metals Write the Constituents of electrolyte for the extraction of aluminium Write balanced chemical equation The reduction of ferric oxide Calamine is heated Heating of iron with sulphur Why HCL gas is not dried by using phosphorous pentaoxide and  calcium oxide. Write balanced equation for the reaction of Manganese(IV) oxide and concentrated HCL State two reaction of H2SO4 with sulphite and bisulphte State that H2SO4  acts as a Dehydrating agent Test for Sulphuric acid 2018-12-20 07:14:40 Edit Delete
CLASS 10 SCIENCE CBSE IMPORTANT QUESTION RBeI Education CHEMICAL REACTION & Equation What is balanced equation? Why should the chemical equation be balanced? What does one mean endothermic & exothermic reaction? Give example What do you mean by precipitation reaction? Explain giving example Difference between oxidation & reduction Why photosynthesis is considered an endothermic reaction? What is an oxidation reaction? Give an example of oxidation reaction. Is oxidation is an exothermic or an endothermic reaction?                                     ACID, BASES & SALT While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? Why does an aqueous solution of an acid conduct electricity? Why do acids not show acidic behavior in the absence of water? Write difference between Acid, Salt & Bases? What is meant by water crystallization ? Explain that the crystalline salts contains water of crystallization. What is universal indicator? Give its use.                                       METALS AND NON- METALS Explain the meaning of malleable and ductile? Define the term (a) Mineral, (b) Ore, (c) Gangue Differentiate between metals and non-metals on the basis of their chemical properties? Give reason why copper is used to make hot water tank but not steel (an alloy of iron) What is 24 carat gold? How will you convert into 18 carat gold? Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?                                                       CARBON AND ITS COMPOUND What are the two properties of carbon which leads to the huge number of carbon compounds we see around us? What are oxidizing agent? Draw the electron dot structure for? Ethaonic acid H2S Propanone F2 Why are carbon and its compounds used as fuels for most application? Write different between Ethanol and Ethanoic Acid What is hydrogenation? What is its industrial application?                                   PERIODIC CLASSIFICATION OF ELEMENTS What were the criteria used by Mendeleev in creating his periodic Table? How does the electronic configuration of an atom relate to its position in the modern Periodic Table? What do you understand by the term periodicity? Does the periodicity in properties is a function of valences electrons? Illustrate  Why are the elements of group 18 called zero valent? State the basis classification of an element in the modern periodic table Why are isotopes of an elements having different atomic masses placed at the same position in the periodic table?                                                                                           LIFE PROCESS How food is transported in plant? How is oxygen and carbon dioxide transported in human beings? Describe the function of Nephrons? What is the role of saliva in the digestion of food? Write the difference between of the following: Transport in Xylem & Transport in Phloem Alveoli & Nephron Aerobic Respiration & Anaerobic Respiration What is light & dark reaction?                                       CONTROL & COORDINATION What are the difference between a reflex action and walking? What are plant hormones? Draw the structure of a neuron and explain its function? What is the need for a system of control and coordination in an organism? What are the advantage of the fact that most reflex actions are governed by spinal cord? Differentiate between Tropic and Nastic Movement in plants?                                       HOW DO ORGANISMS REPRODUCES? How is the process of pollination different from fertilization? How do the binary fission differ from multiple fission? Why does mensuration occurs? What is menopause? Explain various steps of budding in Yeast. Difference between Natural Propagation and Artificial Propagation?                                           HEREDITY AND EVOLUTION How is the sex of the child determined in human beings? What are fossils? What do they tells us about the process of evolution? How does use and disuse of an organ helps in evolution of a new species? What is speciation? List four factor responsible for speciation Mention three important features of fossils which help in the study of evolution? Describe Darwin’s theory of evolution?                                       LIGHT -REFLECTION AND REFRACTION What is a beam light? Write the differences between Concave and Convex Mirrors? What is the significance of +ve sign of magnification? Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror and show the angle of incidence and angle of reflection on it. Describe the word Refraction and Reflection of light? Explain the term lateral inversion?                                       HUMAN EYE AND COLURFUL WORLD What is meant by power of accommodation of eye?  What is colour blindness? Why do star twinkle? What is astigmatism? What causes astigmatism? How is astigmatism corrected? What is Tyndall effect? Explain with an explain What is myopia? State the two causes of myopia. With the help of labelled ray diagrams show The eye defect myopia Correction of myopia using a lens                                     ELECTRICITY  On what factor does the resistance of a conductor depend? Why does the cord of an electric heater not glow while the heating element does? Why does an electric bulb become dim when an electric heater in parallel circuit is switched on? Why does dimness decrease after sometimes? What is commercial unit of electrical energy? Represent it in terms of Joules Why is an ammeter likely to be burnt out if it is connected in Parallel in a circuit Calculate the electrical energy produced in 5 minutes when a current of 2 A is sent through a conductor by a potential differences of 500 volts                                 MAGNETIC EFFECT OF ELECTRIC CURRENT List the properties of magnetic field lines State fleming’s left hand rule What is the function of an earth wire? Why is it necessary to earth the metallic appliances? What is an electromagnet? Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet What are magnetic field lines? How is the direction of a magnetic field at a point determined? Mention two important properties of Magnetic field lines. Explain what is short circuiting and overloading in an electric supply?                                     SOURCES OF ENERGY What is geothermal energy? What are the advantages of nuclear energy? Compare and contrasts fossil fuel and the sun as direct sources of energy What are the advantages and disadvantages of using solar cooker? Are there places where solar cooker would have limited utility? What are the important use of wind energy? Distinguish between Renewable Sources of energy & Non- Renewable Sources of energy                                       OUR ENVIRONMENT Why are some substances biodegradable and some are non- biodegradable? What is ozone and how does it affect any ecosystem? Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage? What are the difference between: Food chain & Food web, Biodegradable waste & Non- Biodegradable waste Explain some harmful effects of agricultural practices on environment Mention role of micro-organism like bacteria and fungi in the ecosystem                                                     MANAGEMENT OF NATURAL RESOURCES What is Narmada Bachao Andolan? Explain in Brief Define biodiversity? Why maintaining a biodiversity is important. What is meant by wildlife? How is it important for us Difference between Renewable sources of Energy & Non- renewable Sources of Energy Explain the role of forest in conserving the environment. How do the fears get depleted? What are the consequences? Explain some harmful effect of agricultural practices on the environment?         2018-12-20 07:14:40 Edit Delete
Class 4 Maths Signs and Order RBeI Education Question paper of Maths Class 4 RAJBALA EDUCATIONAL INSTITUTION PVT. LTD. RBeI WWW.RBEISET.COM 033-46038167 ORDER OF SIGN AND BRACKET             Section A (1x 10= 10)                                                                                F.M = 20 7 + 6 x 4 15 x 4 + 3 12 + 3 + 6 x 3 20  + 10 – 12 x 5 22 – 13 + 7 8 + 12 – 4 75 + 8 x 3 12 + 14 – 10 x 3 8 x 6 x 4 2 x 3 + 5 + 6 + 10 – 15   Section B ( 2x5=10) (3+4)x3 5x6+(2x3) 5+5+5+(12x3) (3+4)+(4x5) (3x2)x(5+2)   This paper will be relevant for class 4 for different ICSE and CBSE and WB schools Heritage Academy High School, St. John's High School, St. Thomas' Church School, Howrah, Howrah High School, Howrah Zilla School, Maria's Day School, St. Agnes’ Convent School, Saint Aloysius Orphanage and Day School, St. Helen's School, Howrah Jogesh Chandra Girls School, Ratnakar North Point School, BANTRA M.S.P.C HIGH SCHOOL, Bantra B.B.P.C Girls High School, Howrah Shiksha Sadan Boys' School, Shree Jain Vidyalaya, Howrah Vivekananda Institution, Town School Howrah, Salkia Vikram Vidyalaya, Sibpur Hindu Girls High School, Augustine's Public School, RBeI, RBEI, RajBala educational institution Pvt. Ltd., Class3, Class4, Class5, Class6, Class7, Class8, Class9, Class10, Class11, Class12, Science, Accounts, Commerce, Maths, Physics, chemistry, Biology, History, Geography, language, literature, Hindi, Grammar, G.K                                 2018-12-20 07:14:40 Edit Delete
Climate Important Questions RBeI Social Studies RAJBALA EDUCATIONAL INSTITUTION PVT. LTD. TEST   Subject: S.S.T (Climate)                                                                                              Time: 45 min                                                                                                                                         Full Marks: 30 Multiple Choice Questions (1 x 3)= 3 A city lies on the Equator. It is located on the plains, far away from the coast. Its climate is expected to be   Hot throughout the year Cold throughout the year Hot in summers and cold in winters Neither very hot nor very cold   Which of these zones receive the maximum heat from the sun?   Tropical zone Frigid zone Temperate zone All of these receive equal amounts of heat If the latitude of a place is 30oN, it lies in the   Tropical zone North Temperate Zone Frigid zone South Temperate Zone   Write T for true and F for false sentences. (1 x 3)=3 The climate near the Equator is hot and wet. [       ] Climate changes from day to day. [    ] During the summer months, days are longer near the Equator than far away from it. [  ] Fill in the blanks.(1 x 4)=4 The amount of water vapour in the air is known as _______________. The heat zone farthest from the Equator is the ______________zone. The condition of the atmosphere at a particular place and time is called____________. As we go up on a mountain, it becomes_____________(cooler/ warmer). Answer the following questions. Define: Frigid Zones, Tropical Zone, Temperate Zones. (2 x 3) =6 How do winds affect the climate of a place?(4) Name the five important factors that determine the climate of a place. (5) What is the difference between weather and climate?(5)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       Heritage Academy High School, St. John's High School, St. Thomas' Church School, Howrah, Howrah High School, Howrah Zilla School, Maria's Day School, St. Agnes’ Convent School, Saint Aloysius Orphanage and Day School, St. Helen's School, Howrah Jogesh Chandra Girls School, Ratnakar North Point School, BANTRA M.S.P.C HIGH SCHOOL, Bantra B.B.P.C Girls High School, Howrah Shiksha Sadan Boys' School, Shree Jain Vidyalaya, Howrah Vivekananda Institution, Town School Howrah, Salkia Vikram Vidyalaya, Sibpur Hindu Girls High School, Augustine's Public School, RBeI, RBEI, RajBala educational institution Pvt. Ltd., Class3, Class4, Class5, Class6, Class7, Class8, Class9, Class10, Class11, Class12, Science, Accounts, Commerce, Maths, Physics, chemistry, Biology, History, Geography, language, literature, Hindi, Grammar, G.K, CBSE, ICSE, WB Board, Sudhir Memorial Institute Liluah, St. George's School, Abhinav Bharati High School, Asian International School, St. John's High School, The North Academy, Hariyana Vidya Mandir, National High School (CBSE Campus), Lakshmipat Singhania Academy, Kendriya Vidyalaya Garden Reach, Delhi Public School, Howrah, Kendriya Vidyalaya Cossipore, Augustine's Public School, Birla High School, Kendriya Vidyalaya Bamangachi, Kendriya Vidyalaya - Fort William, G.S.S. Girls' School, Indus Valley World School, Apeejay School, RBeI, RBEI, rbei, Rajbalaeducationalinstitution, raj bala educational institution, Climate, Geography 2019-11-16 07:14:13 Edit Delete
Maths Question Paper RBeI Education   RAJBALA EDUCATIONAL INSTITUTION PVT. LTD.   Subject: Mathematics                                                                                        Time: 2-hour 45 min                                                                                                                                  Full Marks: 90 Group A Answer the following Questions (10 ×3)=30 Let us find the values of the following- Let’s add the algebraic expressions (2x2+x+2) and (x2+2x+2). Let’s subtract: (m2-2) from (-3m2+2m+2). (2p-q)2=(2p+q)2-8pq. Let’s calculate the area of a square whose perimeter is 20 cm. Factorise: (x2y)2-4x2y2. Factorise: x2+9y2+6xy-z2. If (c-3)2=c2+kc+9, let’s find the value of k. Let’s find, what must be subtracted from -11x-7y-9z to get -7x+3y-5z. Let’s express 8x2+50y2 as the sum of two squares. Answer any five question: (5 ×4) =20 Let’s simplify and express each .                If 6x2+1=4x, let’s show that 36x2+  A train of length 100m, moving with a speed of 60 km/hr. passes a tree. How long will it take to do so, lets calculate. A 90 m long train takes 25 sec to pass a pole. Let us calculate the speed of the train in km/hr. Maria’s family has a square plot of land of side 20m. A path 1 m wide runs all around it from outside. Let’s find the area of the path. Factors: 3x2-y2+z2-2xy-4xz. Group-B Answer the following Questions: (5 x 4)=20 The area of a square park PQRS is 2500 sq m. and a path 6m wide runs all around outside the park. Let us find the area of this path.                                          As seen in the figure, two 5m. wide path is dividing a rectangular garden into four equal parts. The length and breadth of the rectangular garden is 60 m and 40 m respectively. Let us calculate the cost of paving the path at Rs. 80 per sq meter. Let’s also find the area of each part of land. Let’s draw a quadrilateral LAND such that LA=6.5 cm AN=5.4 cm, ND=4cm, DL =3.5 cm, LAN=45o. Let’s construct a quadrilateral ABCD in which AB=5.2 cm, BC= 6 cm, CD=4.4 cm, AD=7 cm and AC=10 cm. If in this quadrilateral, AC= 18 cm, could it be possible to construct the quadrilateral, let’s find. Answer the questions:(10 x 2) =20 (a)The number of sides of a quadrilateral is 4. Number of diagonals=  =   ------------------------     (b) Let’s draw a parallelogram GATE whose adjacent sides are , GA= 7 cm and AT -5 cm and ∠GAT=     (c) Let us draw a quadrilateral PLAN is which PL=4.6 cm LA= 5.5 cm, AN=5cm, AN=5cm & (2+4+4). 2. (a) If the angle of rotational symmetry of a regular polygon be 60o, then its number of sides. [2+4+4]     (i) 4    (II) 4             (III) 6             (iv) 7 (b) The height of the second new room of the village hospital is 7 m. Let us find the area of its 4 walls including doors and windows. (c) Let’s also calculate the total cost of plastering the walls , without doors and window at Rs.95 per sq m and cost of painting the walls at Rs. 40 per sq m.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Heritage Academy High School, St. John's High School, St. Thomas' Church School, Howrah, Howrah High School, Howrah Zilla School, Maria's Day School, St. Agnes’ Convent School, Saint Aloysius Orphanage and Day School, St. Helen's School, Howrah Jogesh Chandra Girls School, Ratnakar North Point School, BANTRA M.S.P.C HIGH SCHOOL, Bantra B.B.P.C Girls High School, Howrah Shiksha Sadan Boys' School, Shree Jain Vidyalaya, Howrah Vivekananda Institution, Town School Howrah, Salkia Vikram Vidyalaya, Sibpur Hindu Girls High School, Augustine's Public School, RBeI, RBEI, RajBala educational institution Pvt. Ltd., Class3, Class4, Class5, Class6, Class7, Class8, Class9, Class10, Class11, Class12, Science, Accounts, Commerce, Maths, Physics, chemistry, Biology, History, Geography, language, literature, Hindi, Grammar, G.K, CBSE, ICSE, WB Board, Sudhir Memorial Institute Liluah, St. George's School, Abhinav Bharati High School, Asian International School, St. John's High School, The North Academy, Hariyana Vidya Mandir, National High School (CBSE Campus), Lakshmipat Singhania Academy, Kendriya Vidyalaya Garden Reach, Delhi Public School, Howrah, Kendriya Vidyalaya Cossipore, Augustine's Public School, Birla High School, Kendriya Vidyalaya Bamangachi, Kendriya Vidyalaya - Fort William, G.S.S. Girls' School, Indus Valley World School, Apeejay School, RBeI, RBEI, rbei, Rajbalaeducationalinstitution, raj bala educational institution, Climate, Geography, Maths, WB Board Important Questions                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     2018-12-20 07:14:40 Edit Delete
Shree Jain Vidyalaya School Howrah Class 8 Girls Exam Routine SJV RBeI Education Shree Jain Vidyalaya School Howrah Class 8 Girls Exam Routine Exam will start by 7:00 am Exam time will be of 2 hours 30 Mins Full Marks   100 Find out the syllabus and Notes and Chapters in the given Link Click Here given By RBeI (RajBala Educational Institution Pvt. Ltd.) Howrah   29/11/2019            Physical Science 30/11/2019             English 3/12/2019               Maths 5/12/2019                Hindi 7/12/2019                Life Science 10/12/2019              Bengali 11/12/2019               Geography 12/12/2019               History 13/12/2019               Computer   For any help  feel free to contact us we will help you in any manner possible 9073108867   2018-12-20 07:14:40 Edit Delete
Shree Jain Vidyalaya School Howrah Class 7 Girls Exam Routine SJV RBeI Education Shree Jain Vidyalaya School Howrah Class 7 Girls Exam Routine Exam will start by 7:00 am Exam time will be of 2 hours 30 Mins Full Marks   100 Find out the syllabus and Notes and Chapters of class 8 in the given Link Click Here given By RBeI (RajBala Educational Institution Pvt. Ltd.) Howrah Find out the syllabus and Notes and Chapters of class 7 in the given Link Click Here given By RBeI (RajBala Educational Institution Pvt. Ltd.) Howrah     29/11/2019            Maths 30/11/2019             History 3/12/2019               English 5/12/2019                Computer 7/12/2019                Geography 10/12/2019              P.Science 11/12/2019               Hindi 12/12/2019               Life Science 13/12/2019               Bengali   For any help  feel free to contact us we will help you in any manner possible 9073108867 2018-12-20 07:14:40 Edit Delete
Class 9 Science CBSE Important Question Chemistry Matter in our Surroundings, Is matter around us pure, Atoms and Molecules, Structure of Atom RBeI Education MATTER IN OUR SURROUNDINGS Fill in the Blanks Evaporation of a liquid at room temperature leads to a ______ effect. The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called ______ The laboratory thermometers and the clinical thermometer are calibrated in __________ 0° C = _______ K The temperature is recorded by ______ The thermometers with Fahrenheit scale are calibrated from _____ The process of freezing is the reverse of __________ The process of condensation is the reverse of _______ The pressure is ______ at sea level. Evaporation of a liquid is always accompanied by ______ in temperature or cooling. Multiple Choice Question A few substances are arranged in the increasing order of forces of attraction between their particles. Which one of the following represents a correct arrangement? Water, air, wind Air, sugar, oil Oxygen, water, sugar Salt, juice, air On converting 25°C, 38°C and 66°C to Kelvin Scale, the correct sequence of temperature will be: 298K, 311K and 339K 298K, 300K and 338K 273K, 278K and 543K 298K, 310K and 338K The property to flow is unique in fluids. Which one of the following statement is correct? Only gases behave like fluids Gases and solids behave like fluid Gases and liquid behave like fluids Only liquids are fluids During summer, water kept in an earthen pot become cool because of the phenomenon of: Diffusion Transportation Osmosis Evaporation The rate of evaporation decreases with increase in: Surface area Temperature Humidity Wind speed The state of matter which have fixed volume but lack definite shape is: Solid Liquid Gas Plasma Write True or False The term vapour represent the gaseous state of a substance that exists as a liquid or solid -273 K = 0°C Solid cannot flow from one place to another An absolute temperature scale is the Celsius scale Short questions and answers Which substance in its gaseous state is called vapour? Name two gases supplied in homes and hospitals in compressed form. Expand: (a) CNG (b) LPG Name the term used to describe the mixing of copper sulphate and water kept in a beaker on its own. Name the particles which make up matter. Long Question and Answer Define diffusion? Explain the phenomenon of diffusion with an example. Gases take the shape of the container in which they are present. Comment? Give reason: “Gases have no fixed boundaries” Why does the temperature of a substance remain constant during its melting point or boiling point? Draw a labelled diagram of the experimental set up to demonstrate the sublimation of ammonium chloride? Explain an activity to show the factors affecting evaporation?     IS MATTER AROUND US PURE Fill in the blanks: The mixture of metal are called______ % strength by Mass = ___________ A colloid is a ___________ mixture and its component can be separated by the technique is known as _______ Ice, water and water vapour look different and display different __________ properties but they are ____ the same. The liquid which leaves behind a residue on heating is ______ Pure liquid from a solution is obtained by ______ A ____ shows the properties of constituent substances. New substances are formed in a _____ change. Air is a ____ of several gases Tyndall effects is produced by ______ Multiple Choice Question Particles of which are visible by naked eyes: Mixture Colloidal solution Suspension None of these Most elements are: Solids Liquids Gases Mixtures Select the non-metal from the following: Diamond Gold Silver Platinum Select a colloidal solution out of the following. Gold ornaments Sand grains Lime water Paint Impure salt can be purified by the process: Fractional evaporation Distillation Fractional purification Crystallization Solution of soap in water is a: True solution Colloidal solution Suspension None of the above Write True or False A liquid mixture of carbon tetrachloride and water can be separated by separating funnel Sodium chloride undergoes sublimation. Air is a compound Iodine and sand can be separated by sublimation Short questions and answers Define aerosol? Differentiate between a solution and a mixture Define following terms: Ductility Malleability Brittleness What is meant by element and a compound Explain tyndall effect. Long Question and Answer Calculate the mass of sodium sulphate required to prepare its 20% (mass percent) solution in 100 g water?  Differentiate between colloid, suspension and solution Define filtration? Give any three example in which filtration proceed is used? Define distillation. Explain the principle of distillation Define magnetic separation. What is meant by sublimate? Define fractional crystallization.       ATOMS AND MOLECULES Fill in the Blanks The law of conservation of mass was proposed by ______ in _______ The law of constant was proposed by _________ in ______ The smallest particles of matter are_______ The radius of an atom or the atomic radius is measured in _____ _______ are the building blocks of all matter Alchemist were also called__________ Atoms exist in the form of _________ and ________ Atoms of the same elements or of different elements can join together to form ________ Ions are also called as__________ Formula of sodium carbonate is ________ and that of ammonium sulphate is ______ Multiple Choice Questions Which among the following is not correctly matched? Copper – Co Cobalt- Co Calcium – Ca Silver- Ag A sample contains 22g of carbon dioxide. This is equal to: One molar volume of carbon dioxide One mole of carbon dioxide Half mole of carbon dioxide Two moles of carbon dioxide One amu means: Mass of hydrogen molecules Mass of C- 12 atoms 1/12th mass of C-12 atoms Mass of O- 16 atoms The value of Avogadro constant is: 6.022 x 1024 6.022 x 1022 6.022 x 1023 60.22 x 1023 Kalium is the latin name of: Potassium Krypton Calcium Phosphorous The term ‘mole’ was introduced by: Lavoisier Dalton Ostwald Avogadro Write True or False Copper is diatomic A sulphide ion has positive charge The formula of calcium oxide is Ca2O2 The law of definite proportions was proposed by Proust Short Questions and Answers Define chemical formula. Write down the chemical formula of (a) Hydrogen peroxide, (b) Zinc nitrate. Define molar mass. Give its unit Give the atomic mass of: (a) Magnesium (b) Calcium (c) Potassium? What are the drawbacks of Dalton’s atomic theory? Why Dalton’s atomic theory was accepted? Define law of constant proportion. Long Question and Answers Mention features of Dalton’s atomic theory. If the ratio by mass of magnesium and Sulphur is 3: 4 in magnesium sulphide, then what is the ratio of the number of magnesium and Sulphur atoms? Define formula unit of an ionic compound. Give the formula unit of sodium chloride and magnesium chloride. Define empirical formulae. How will you determine the empirical formulae? Differentiate between simple and compound ions. How will you calculate the formula mass of an ionic compound?                 STRUCTURE OF ATOM Fill in the Blanks: The charge on the electron was determined by________ The subatomic particles were regarded as the ____________ The absolute charge of the proton is________ Bohr model of atom was based on _______ ________ rays are negatively charged The __________ fundamental sub atomic particles are negatively charged Anode _______ rays are also called. Mass of a proton is ________ times the mass of an electron ________ are atoms of the same element, which have same number of proton but different mass numbers. Atomic number is equal to_________ Multiple choice Questions: The maximum number of electron that can be accommodated in M shell is: 2 8 18 32 Protium, Deutrium and Tritium are isotopes of Rhodium Sodium Helium Hydrogen Number of neutrons presents in Hydrogen atom is: 0 2 1 3 In an atom, the mass number of an atom is equal to the number of: Nucleons Proton Electrons Neutrons α – particles are: negative charged particles positive charged particles beam of neutrons gamma radiations proton was discovered by: Rutherford Goldstein Chadwick J.J. Thomson Write True or False The outermost shell is an atom have more than 8 electrons Electron are stationary in different energy shell. All atoms exist independently I-131 is effective in the treatment of cancer. Short Question and Answers What are canal rays? Differentiate between electron, proton and neutron Calculate the number of neutrons present in the nucleus of an elements X which is represented as 3115 X Why do Helium, Neon and Argon have a zero valency? Name the scientist and his experiments to prove that nucleus of an atom is positively charged? Long Question and Answers Describe Rutherford’s model of an atom. What are the isotopes of hydrogen? Give their symbols and name. Explain why the atomic masses of many elements are in fractions and not in which whole numbers? Explain the characteristics of cathode rays. What are the drawbacks of Rutherford’s model of an atom? What are the postulate of Bohr’s model of an atoms?                       Important Links : 1) How to master Physics for IIT-JEE Class 11 and 12 Boards 2) Bye-Bye Exams by Dr. Sayantani Bhattacharjee 3) An Experts Speaks by Souravi Chakraborty 4) Class 10 CBSE Science Important questions This will include all the chapters of Science Chapter 1 – Chemical Reactions and Equations. Chapter 2 – Acids, Bases, and Salts. Chapter 3 – Metals and Non-Metals. Chapter 4 – Carbon and Its Compounds. Chapter 5 – Periodic Classification of Elements. Chapter 6 – Life Processes. Chapter 7 – Control and Coordination. Chapter 8: How do Organisms Reproduce? Chapter 9: Heredity and Evolution Chapter 10: Light – Reflection and Refraction Chapter 11: Human Eye and Colourful World Chapter 12: Electricity Chapter 13: Magnetic Effects of Electric Current Chapter 14: Sources of Energy Chapter 15: Our Environment Chapter 16: Management of Natural Resources 5) For Class 6,Class7, Class8, Class9, Class10 visit our website for more details www.rbeiset.com 2018-12-20 07:14:40 Edit Delete
Class 9 Science CBSE Important Question THE FUNDAMENTAL UNIT OF LIFE, TISSUES, DIVERSITY IN LIVING ORGANISM, WHY DO WE FALL ILL, NATURAL RESOURCES, IMPROVEMENT IN FOOD RESOURCES RBeI Biology Marks Distribution: A- 1 x 10 = 10                                        B- 1 x 6 = 6                                       C- 1 x 4 = 4                                       D- 2 x 5 = 10                                       E- 5 x 5 = 25 Total Marks: 55 marks each chapter THE FUNDAMENTAL UNIT OF LIFE Fill in the Blanks ___________ is known as the energy currency of the cell The cell wall is made up of ___________ The cell was discovered by _______ Lysosome is also called _____ Ostrich egg is the ______ cell Nucleus was discovered by _________ Mitochondria are called ________ of the cell The ________ of plant cell is due to cell wall. Cell centriole is absent in _________ Eukaryotic ribosomes are ____ Multiple Choice Question The first person to observe a cell under microscope was M. Schleiden T. Schwann Robert Hooke A. V. Leeuwenhoek Cell theory proposed by: Morgan Robert Brown Schleiden and Schwann Robert Hooke Cell wall shows: Complete permeability Semi permeability Differential Permeability Impermeability Plant cell wall is mainly composed of Sugar Cellulose Proteins Lipids Cell is: Functional unit of life Structural unit of life Hereditary unit of life All of the above Plasma membrane is: Impermeable Formed of cellulose Selectively permeable Nonselective Guess the word I am seen only in a plant cell. I am a system of tubes through the cytoplasm am involved in transporting materials I am the liquid inside the cell mostly made up of water. I am the site of photosynthesis in plant cells. Short questions and answers What is plasma membrane? Differentiate between exosmosis and endosmosis. Define Passive and Active transport. What are the functions of cell wall? What happen when an animal cell is placed in a very dilute external medium? Why? Long Question and Answer Draw an animal cell and label five important organelles found in it. Explain different types of diffusion? Differentiate between Transport and Diffusion How does an Amoeba obtain its food? Differences between Plant cell and Animal cell? Explain the composition of Golgi Bodies? Explain the structure of Golgi bodies as seen in Plant and animal cell.                                         TISSUES Fill in the blanks: The study of tissues is called _____ The term tissue was contained by _______ Both Xylem and Phloem Constitute ________ The vessels are also called _______ Xylem parenchyma is also called _________ The phloem fibres are also called ______ The simple squamous epithelial cells are also called ___ and ____ epithelium The red blood cells are also called ________ The white blood cells are also called ______ ________ are forms of complex tissue. Multiple Choice Question Parenchyma cells are: Relatively unspecified and thin walled Thick walled and specialised Lignified None of these Bone matrix is rich in: Fluoride and calcium Calcium and phosphorus Calcium and potassium Phosphorus and potassium Nervous tissue is not found in: Brain Spinal cord Tendons Nerves Which of the following tissue has dead cells? Parenchyma Sclerenchyma Collenchyma Epithelial tissue The dead element present in the phloem is: Companions cells Phloem fibres Phloem Parenchyma Sieve Tubes Nerves cell does not contain: Axon Nerve ending Tendons Dendrites Name the Following The tissue that stores fat in our body The neuron which carry impulses towards brain The most common type of ground tissue The tissue that forms inner lining of our mouth Short questions and answers Mention some important function of tissue Explain three types of simple tissues Draw a labelled diagram of Parenchyma Differentiate between tracheids and vessels What are the various types of white blood cells? What is goblet cell? Long Question and Answer Draw the Internal structure of stem Write a short note on complex tissues Classify connective tissue and give a brief note on it Differentiate between Complex tissue and Simple tissue Explain the structure of neuron with the help of neat diagram             DIVERSITY IN LIVING ORGANISM Fill in the Blanks India is one of the ________ mega diversity countries in the world. The artificial system of classification was based on ________ The natural system of classification was based on ______ The phylogenetic system of classification was based on ______ The plant in Thallophyta include________ The cell wall of Thallophyta is made up of _____ The plant without differentiation of body belong to division ______ The plants without specialized vascular tissue belongs to ____ The plants with vascular tissue which produce naked seeds belong to _____ The flame cells help in ______ and ________ Multiple Choice Questions Which one is true fish? Jelly fish Star fish Dog fish Silver fish Skeleton is made entirely of cartilage in: Sharks Tuna Rohu None of these In taxonomic hierarchy family comes between: Class and Order Order and Genus Genus and Species Division and class Well defined nucleus is absent in: Blue green algae Diatoms Algae yeast The locomotory organs of Echinodermata are: Tube feet Muscular Feet Jointed legs Parapodia Real organ are absent in: Arthropoda Mollusca Echinodermata Coelenterata Write True or False Whittaker proposed five kingdom classification Blue green algae belong to the kingdom Protista All prokaryotes are classified under Monera Monera divided into Archaebacteria and Eubacteria Short Questions and Answers Differentiate porifera and cnidarian. List any four characters of phylum Arthropoda Differentiate between primitive and advanced organisms Give two disadvantages of two kingdom classification Give any four characters of Bryophyta Long Question and Answers Describe the general characteristics of mammals Compare the character between bryophytes and pteridophytes Define Diversity? What is meant by megadiversity? Who gave the method of binomial nomenclature Why are amphibian are found both in land and water? Distinguish between algae and fungi? How the complexity of cell structure and their number can be used in classification.                         WHY DO WE FALL ILL Fill in the Blanks: ________ and ________ are important to maintain individual health Our physical environment is decided by our ________ environment Female Anopheles spreads _______ _________ is the carrier of cholera and dysentery __________ was responsible for prepticulers Hepatitis targets__________ Many skin disease are caused by _______ Pneumonia is an example of ________ disease Fungal disease targets___________ __________ disease continues for many days and causes on _______ body Multiple choice Questions: Health is ______ Mental well being Complete physical wellbeing Social Wellbeing All of the above Antibodies are ____ Lipids Genes Proteins Carbohydrates AIDS day is on? May 1 December 20 December 1 June 1 World Health Day is on______ 1st May 7th April 30th June 5th December Remain healthy means Free from infection by pathogen Tension free mental status Living in a pollution free environment All of the above Rabies is caused by the bites of ____ Dog Cat Monkey All of the above Write True or False HIV is retrovirus The deficiency of Vitamin A causes rickets Typhoid is infectious disease The vector of malaria is female Anopheles (mosquito) Short Question and Answers What does the word ‘health’ refers to? Define community health. Mention the symptoms and causes of inflammations Comment ‘Prevention is better than cure’. Mention the symptom of AIDS Differentiate disease free and healthy Long Question and Answers What are the different ways by which microorganism enter our body? Explain the external factors affecting human health Explain how microorganism enter our body Give a short note on any three bacterial diseases of human being. What are the essential condition of good health? Why AIDS is considered to be a ‘Syndrome’ and not a diseases                                               NATURAL RESOURCES Fill in the blanks: The _____ are tools for the development of human being. The biogeochemical cycles determine ________ The atmosphere covering the earth act as a _______ Humus makes the soil _________ The major consumers of carbon dioxide are ______ Oxygen is returned to the atmosphere in the process of ______ Greenhouse effect is produced by the presence of ______ ______ gas is produced at Mathura refinery. ______ is the envelope of air which surrounds the earth. Coal is an /a ______ Multiple Choice Question Which one of the following is renewable resources? Water Metals Fossil fuel All of the above Biosphere is made of Living beings and their remains Living being and lithosphere Living being, lithosphere, hydrosphere and atmosphere Living being, lithosphere and hydrosphere Acid rain mainly contains: Nitric acid Hydrochloric acid Sulphuric acid Both (a) and (c) Soil is a part of: Atmosphere Lithosphere Hydrosphere Ionosphere Percentage of nitrogen in air is: 77.02% 78.09% 76.08% 74.09% Soil erosion can be prevented by: Deforestation Afforestation Overgrazing Removal of vegetation Write true or false Carbon is incorporated into life form by photosynthesis by green plants Land gets heated faster than water Earth is the only planet where life exists Wind is caused by uneven heating of air over land and water bodies. Short answer and question Explain the composition of air Write a short note on wind. How changes of temperature effect living organism in water? Define the term soil Pollution. Give one reason for it. How is soil formed? What is the role of human in fertility of soil? Long Question and Answers What is deforestation? Give two reason for it. Explain ozone layer, its advantages and depletion. Write about the Ozone hole in the Antarctica. Define Global Warming, mention two causes for it. Draw the schematic diagram of Water Cycle in the nature. What is greenhouse effect? Name the different greenhouse gases                     IMPROVEMENT IN FOOD RESOURCES Fill in the Blanks ___________ crop grows in winter seasons Growing of wheat and groundnut on the same field is called as _____ Causal organism of any disease is called as _______ Pigeon pea is a good source of _______- ________ nutrients are needed in small quantity for plants and are called ________ Soil supply _______ nutrients to plants. A total of _____ nutrients are essential to plants Wheat, gram, pea, mustard are ________ crops Photoperiod affect the____ Rabi crops are cultivated from __________ to _______ Multiple Choice Question Which one of the following nutrients is no available in fertilizers? Nitrogen Phosphorus Iron Potassium Which one of the following fishes is a surface feeder? Rohus Mrigals Common carps Catlas 2019-04-05 12:45:03 Edit Delete