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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.

FREE SOLUTIONS TO SCIENCE BOARD PAPER

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

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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.

[2+3=5]

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

Q.

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.

SECTION – ‘C’

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.

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