AIPMT PRELIMS2003Chemistry-Chemical Kinetics
AIPMT PRELIMS 2003 Chemistry Activation Energy MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The activation energy for a simple chemical reaction A → B is Ea in forward direction. The activation energy for reverse reaction :
A
Is negative of Ea
B
Is always less than Ea
C
Can be less than or more than Ea
D
Is always double of Ea
Correct Answer
Option C
Detailed Explanation
The activation energy for the reverse reaction depends on the enthalpy change of the reaction and can be either less than or more than Ea, depending on whether the reaction is exothermic or endothermic.
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