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Chemistry · PYQ NEET UG 2023

हिन्दी

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R : \n Assertion A : A reaction can have zero activation energy.\nReasons R : The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.\nIn the light of the above statements, choose the correct answer from the options given below :

  1. A
    Both A and R are true and R is the correct explanation of A.
  2. B
    Both A and R are true and R is NOT the correct explanation of A.
  3. C
    A is true but R is false.
  4. D
    A is false but R is true.
View Answer & Solution

Correct answer · Option B

Both A and R are true and R is NOT the correct explanation of A.

Explanation

Some radical combinations have zero activation energy (Assertion A is true). The definition of activation energy given in Reason R is also correct, but R does not explain why activation energy can be zero.
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