CBSE Class 10 Sample Paper Science Solution - For 2024 Boards

Question 1

Question 2 Important

Question 3

Question 4

Question 5 Important

Question 6

Question 7

Question 8 Important

Question 9

Question 10 Important

Question 11

Question 12

Question 13 Important

Question 14 Important

Question 15 You are here

Question 16 Important

Question 17 [Assertion Reasoning] Important

Question 18 [Assertion Reasoning]

Question 19 [Assertion Reasoning]

Question 20 [Assertion Reasoning] Important

Question 21

Question 22 Important

Question 23 (Choice 1) Important

Question 23 (Choice 2)

Question 24

Question 25 (Choice 1)

Question 25 (Choice 2) Important

Question 26

Question 27 Important

Question 28 (Choice 1) Important

Question 28 (Choice 2)

Question 29 Important

Question 30

Question 31 (i) Important

Question 31 (ii)

Question 31 (iii) Important

Question 32 (i)

Question 32 (ii) Important

Question 33 Important

Question 34 (Choice 1A)

Question 34 (Choice 1B) Important

Question 34 (Choice 2)

Question 35 (Choice 1)

Question 35 (Choice 2A) Important

Question 35 (Choice 2B)

Question 36 (Choice 1) Important

Question 36 (Choice 2) Important

Question 37 (a) [Case Based]

Question 37 (b) - Choice 1 [Case Based] Important

Question 37 (b) - Choice 2 [Case Based]

Question 38 (a) [Case Based] Important

Question 38 (b) [Case Based]

Question 38 (c) - Choice 1 [Case Based] Important

Question 38 (c) - Choice 2 [Case Based]

Question 39 (a) [Case Based]

Question 39 (b) [Case Based] Important

Question 39 (c) - Choice 1 [Case Based]

Question 39 (c) - Choice 2 [Case Based] Important

In 1987, an agreement was formulated by the United Nations Environment Programme (UNEP) to freeze the production of “X” to prevent depletion of “Y”. “X” and “Y respectively referred here are:

(a) Ozone; CFCs

(b) CFCs; rays UV

(c) CFCs; Ozone

(d) UV rays; Diatomic oxygen

 

Answer:

(c) CFCs, Ozone

Chlorofluorocarbons (CFCs) are the gases used in aerosols, refrigerators etc. they are responsible for thinning of the ozone layer in the atmosphere. So, in 1987, The United Nations Environment Program formulated an agreement to freeze the production of Chlorofluorocarbons to prevent the depletion of ozone

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo