UPSC Prelims 2001·GS1·science-and-technology·science and technology

Assertion (A): A Chemical reaction becomes faster at higher temperatures. Reason (R): At higher temperatures, molecular motion becomes more rapid. (

Dalvoy logo
Reviewed by Dalvoy
UPSC Civil Services preparation
Last updated 23 May 2026, 3:31 pm IST
  1. ABoth A and R are individually true and R is the correct explanation of ACorrect
  2. BBoth A and R are individually true but R is NOT a correct explanation of A
  3. CA is true but R is false
  4. DA is false but R is true

Explanation

The correct option is A because both statements are true and the reason directly explains the assertion. According to the kinetic theory of matter, as temperature increases, molecules gain kinetic energy and move more rapidly. This increased molecular motion leads to a higher frequency of collisions between reactant particles. More importantly, a greater fraction of these molecules possess the necessary activation energy to overcome the energy barrier required for a reaction. Consequently, the rate of the chemical reaction increases, making the reaction faster.
science-and-technology: Assertion (A): A Chemical reaction becomes faster at higher temperatures. Reason (R): At higher temperatures, molecular
ShareWhatsAppXTelegram

Related questions

More UPSC Prelims practice from the same subject and topic.