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Science paper cbse board

science paper cbse board 9. To test the Ignition of magnesium, it is taken as [1]

(a) Ribbon
(b) Fillings
(c) Strips
(d) Granules

Q.10 Ammonium chloride was separated from sand by sublimation. The material left behind in the china dish is called [1]
(a) Residue
(b) A non – sublimate
(c) A decomposed matter
(d) All the above

Q.11 (i) Identify the correct combination of methods to separate a mixture of sand, common salt and ammonium chloride. [2]
(a) Magnetic separation and filtration
(b) Sublimation and separating funnel
(c) Magnetic separation and sublimation
(d) Evaporation and sublimation
(ii) What is the difference between evaporation and sublimation?

science paper cbse board

Most smart students attempt these papers to boost their confidence. Seeing unexpected questions and then being able to solve them give students the confidence they need to attempt the final exam without getting nervous. Even if they are not able to solve all the questions effortlessly, it gives them a chance to identify their weak areas and work on them. So in both ways, these papers are helpful in CBSE board exam preparation.

If the last year's solutions are solved by expert teachers, there is nothing like it. This way board exam aspirants can learn how to answer questions, the points and steps they need to cover in the answer and the ones they can leave out to save time. All these factors play a very important role in marking your answer sheet. When you know the ideal answer to any question, chances are high that you will answer a similar question completely and in the right manner.


However, students found it to be lengthy than expected. Here is the detailed analysis of Science paper:


Section A: This section comprised 24 questions, in which students found the first three questions to be very easy. Questions with weightage of five marks was found to be easy which also had a passage based question. Questions were generally straight, but the section was considered to be very lengthy and time consuming, particularly so for question No.

(ii) Calculate retardation.
(iii) For which time interval is there no force acting. [5]

Q.10. Choose the correct option : [3]

(i) The force winch comes into play when one body tends to slide over another is called

(a) Thrust
(b) Force of friction
(c) Pressure
(d) None of these

(ii) Which of the following method is not a method to reduce force of friction

(a) Oiling
(b) Lubrication
(c) Decreasing the area of contact between that two bodies.
(d) Increasing the weight of one body

(iii) You have four spring balances P, Q, R and S with least count 4g, 6g, 8g, 10g.

The predictability also makes you more comfortable in solving the question paper on the final exam day.

With last years' exam papers, you can be much better prepared for your exams and be assured that whatever happens, you will be able to handle it well. Many parents believe that if students are given last years' papers, they will not want to study the entire curriculum. The truth is that questions are asked from every part of the syllabus and hence, students will have to go through each and every section to solve the questions. If there is a doubt, you can introduce these papers during the later stages of exam preparation but they should not be neglected.


Q.6. (a) Name the process used to separate a mixture of acetone and water. [1+1+3=5]
(b) Give the principle of this process.
(c) Draw a labeled diagram of the process to show the separation of the above mixture.

Multiple Choice Questions

Q.7. Four students A, B, C and D were given: (i) milk, (ii) blood, (iii) sugar solution, (iv) egg albumin in water respectively. They were asked to centrifuge their solutions. In some cases particles settled on centrifugation. The correct reporting of settled particles was done by [1]

(a) A and B
(b) A, B and C
(c) B, C and D
(d) A, B and D


1. Define latent heat of vaporization. Why does the temperature not change during the change of state from solid to liquid? [2]

Q.2. Give three reasons to suggest that bronze is a mixture, not a compound. [3]

Q.3. (a) Which is more effective in cooling, ice at 273K or water at the same temperature? Give reason.

(b) State two reasons to prove that water is a liquid at room temperature. [3]

Q.4. Why does evaporation cause cooling? State and explain any two factors which increase the rate of evaporation. [3]

Q.5. (a) 15 g of common salt are dissolved in water. The solution was found to weigh 115g.

There are so many incidents where students fail to perform well in spite of knowing the answers. It has been observed that students who go through CBSE previous year question papers are better prepared for the final board exams as compared to students who have not done any such preparation. There are many ways in which students get help in scoring good marks using previous year question paper.

Firstly, anyone who has seen previous year solved question paper for class 10 and 12 would know what to expect from the question paper. Board exam papers are set differently than the ones which students attempt at school level. Knowing the format, makes them comfortable and also lets them manage the available time better. By attempting these papers, students can decide the amount of time they can spend for each section and allocating time for questions based on the weightage.


Q.1 What will happen if the medium has a lower concentration of water than the cell? [1]

Q.2 Name two cropping patterns to give maximum benefit in crop production? [1]

Q.3 (a) Draw a labeled diagram (longitudinal section) of collenchyma tissue [3]
(b) In what one way they differ from parenchyma?

Q.4 Differentiate between striated, unstrained and cardiac muscles on the basis of their structure and location in the body. [3]

Q.5 what are? [3]
(i) Compost
(ii) vermicompost
(iii) green manure

Q.6 (a) “Removal of weeds from cultivated fields during the early stages of crops is essential for a good harvest” Justify the statement.

Here are some of those:

Q 15 (i) Planaria, insects, octopus and vertebrates all have eyes. Can we group eyes of these animals together to establish a common evolutionary origin? Justify your answer.

(ii) “Birds have evolved from reptiles”. State evidence to prove the statement.

Q 28 Four students P, Q, R and S traced the path of a ray of light passing through a glass slab for an angle
of incidence 40° and measured the angle of refraction. The values as measured by them were 18°; 22°; 25°
and 30° respectively. The student who has performed the experiment methodically is

(A) P
(B) Q
(C) R
(D) S


**FREE! CBSE-10 SST NCERT Solutions

Overall, if students were well prepared and the preparation was thorough, good results can be expected for class 10 for this paper.

For those of you who have been studying on Meritnation, will know that the following questions that have already been discussed on the Ask & Answer forum of the website, were exactly the same as it appeared in the paper. And for those who did not – Now you know what you might have missed out on!

Delhi Set 1- Q5: CLICK HERE

Delhi Set 1 Q13: CLICK HERE

Delhi Set 3 Q7: CLICK HERE

Delhi Set 3 Q10: CLICK HERE

Team Meritnation wishes you all the very best for the Social Science exam on 10 March,2015

Good Luck!

Explain the term absolute refractive index of a medium and write an expression to relate it with the speed of light in vacuum.

(b) The absolute refractive indices of two media ‘A’ and ‘B’ are 2.0 and 1.5 respectively. If the speed of light in medium
‘B’ is 2 × 108 m/s, calculate the speed of light in:

(i) vacuum,
(ii) medium ‘A’.

**MUST READ- CBSE 10- SST Board Paper Solutions

Section B: This section had direct questions as it was a multiple choice questions section.

An air of nervousness as well as excitement could be observed among the parents who were waiting outside the centres. The duration of the exam was of three hours. It began at 10:30 am and ended at 1:30 pm.

The time allotted to read the question paper, which was distributed at 10:15 am, was 15 minutes. From 10:15 am to 10:30 am, students were given time to read the paper and go through it carefully.

The Science paper was divided into two sections: Section A and B. Section A comprised the theoretical part and carried 70 marks while section B comprised Multiple Choice Questions (MCQ) and carried 20 marks.

Lengthy theoretical part

Most of the students found the section A of the paper a little lengthy, while section B being MCQ was easy. Every question that came in the question paper was from the syllabus itself and nothing was very difficult to understand.

1 If the distance between two points’ masses is doubled, what will happen to the gravitational force of attraction between them? [1]Q.2 Which would require a greater forte -accelerating a 2Kg mass at 5m/s2 or a 5 kg mass at 3m/s2. [2]Q.3 List differences between mass and weight. [2]Q.4 Youstand at the main gate of your house The Ice-cream parlourIs 10m sway from the main gate You walk to the Ice –cream parlour and come back again? [3]
(a) What is the distance you have walked?
(b) What is your final displacement?
(c) Is displacement equal to distance? Give a reason for your answer?Q.5 State Newton’s second law of motion.

Q.8 (a) write any three difference between meristem and permanent tissue [3]
(b) Where are stratified squamous epitheliums tissues present? What is their function?

Q.9 (a) Mention any three factors for which crop variety improvement is done. [3]
(b) What is the use and problem of composite fish culture system

Multiple Choice Questions

1. Which stain is used for staining in onion peel side [1]

(a) Methylene blue
(b) Saffranin
(c) Eosin
(d) Any of the above

2. Label ‘A’ and ‘B’ correctly in the following diagram. [1]

(a) A – nucleus B – dendrite
(b) A – dendrite B – Axon
(c) A – Axon B – dendrite
(d) A – dendrite B – nucleus


This way, when you get a similar question in final exam, you would already know exactly what to write. This will make things easier and will boost your morale in the examination room.

You may not notice this immediately but as you go through the solutions to previous year's questions, you automatically increase your ability to answer questions well. You can easily identify the key idea that needs to be focused in your answer. When there is clarity in your mind, it is easier to bring it down on paper. Every examiner likes precise, to-the-point answers and only a students who has prepared well can answer in such a way.

Practice can make any student perfect and the more previous years' questions one is exposed to, the better are her chances of success. CBSE previous year question papers - class 12 are not only useful for the CBSE board exam but also help in preparing for other competitive examinations too.

Both of them reach the earth at the same time. Will they have equal velocity while reaching the ground? Calculate and find out the answer (take g = 10 m/s2 ) [3]

Q.7. Use velocity time graph to derive graphically the equation for position-time relation for an object travelling a distance(s) under uniform acceleration (a). [3]

Q.8. (a) State the universal law of gravitation.
b) Masses of two students aA and B setting at a distance of 1m from each other in a class are 50 kg and 60 kg respectively calculate the force of attraction between the two. Give that G = 6.673 x 10-11 it Nm2kg2 [5]



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