Class 9 Science Solved Question Papers: CBSE Class 9 Science Question Paper Set 20
Review targeted exam resources with the CBSE Class 9 Science Question Paper Set 20. Built according to official CBSE standards for the 2026-27 academic year, these downloadable Class 9 Science question papers support effective revision and performance tracking.
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Access the complete question paper PDF for Class 9 Science below. Regular practice with these targeted exam papers builds familiarity with standard question patterns and helps secure higher marks in final evaluations.
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.
Free study material for Science
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Previous Year Question Papers: Class 9 Science
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FAQs
The CBSE Class 9 Science Question Paper Set 20 is available for download on StudiesToday.com. It includes complete set with all sections so that Class 9 students can practice with the exact same paper that came in the CBSE exams.
Yes, the solutions for CBSE Class 9 Science Question Paper Set 20 are prepared by subject matter experts as per official marking scheme. Class 9 students will understand the structure of answers and 'step-marks' methodology Science.
Solving previous year papers like CBSE Class 9 Science Question Paper Set 20 is important to understand repeat themes and question difficulty levels of Science. It helps Class 9 students to test their time management skills too.
Yes, where applicable, CBSE Class 9 Science Question Paper Set 20 is available in both English and Hindi mediums. All students from Class 9 can access Science study material in their preferred language.
No, all previous year question papers on StudiesToday, including CBSE Class 9 Science Question Paper Set 20, are provided free of charge in mobile-friendly PDF.