CBSE Class 9 Science Question Paper Set A

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CBSE Class 9 Science Question Paper Set A. Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SCENCE 

1 In an experiment showing law of conservation of mass why is it necessary to put a cork to the mouth of the flask ?

2 From the symbol 40 /18Ar write down the number of neutrons present in the nucleus of the atom.

3 What was the modifications introduced by Carl Woese, in the classification proposed by Whittaker ?

4 Identify which of the following sounds is musical and which one is the noise. Give also the reason :

(a) Sound of an Orchestra

(b) Sound at a railway platform 

5 State the conditions under which a body will sink or float in a fluid.

6 (a) Define polyatomic ion.

(b) Write the name of the compound (NH4)2SO4 and mention the ions present in it.

7 (a) What are the limitations of J.J Thomsons model of an atom.

(b) Describe the α-particle scattering experiment carried out by Rutheford.

8 (i) Write the chemical formula of magnesium hydroxide.

(ii) Calculate the number of aluminum ions present in 0.051 g of aluminium oxide [Atomic Mass of Al=27 u]

9 Write three characteristics each of the following phyla of animals :

(a) Porifera (b) Coelenterata

10 (a) For the prevention of infectious diseases, some public health programmes of childhood immunisation are conducted in the country. Name four such diseases which are covered under this programme.

(b) Name a disease which has been eradicated from the world, state the principle behind its eradication.

11 State giving reasons whether the following statements are correct or not.

(i) Our surrounding area should be free from stagnant water.

(ii) Staying clean is not necessary as long as you eat a balanced diet.

(iii) Social equality and harmony are necessary for good health. 

Please click the link below to download pdf file of CBSE Class 9 Science Question Paper Set A.

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