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CBSE Class 10 Science 2020 · Paper 31(B) · Question 13

Chemical Reactions and Equations 1 mark Medium
For question numbers 13 and 14, two statements are given — one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below :

Assertion (A): A reaction in which a substance is decomposed into two or more simpler products is known as a decomposition reaction.

Reason (R): The decomposition of a substance is impossible without supplying energy.

  1. (a)Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).
  2. (b)Both (A) and (R) are true, but (R) is not the correct explanation of the assertion (A).
  3. (c)(A) is true, but (R) is false.
  4. (d)(A) is false, but (R) is true.

Answer

(b) Both (A) and (R) are true, but (R) is not the correct explanation of the assertion (A).

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