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A reaction can have zero activation energy.
Reason: The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.
A
Both A and R are true and R is the correct explanation of A
B
Both A and R are true but R is NOT the correct explanation of A
C
A is true but R is false
D
A is false but R is true
Explanation
Radical recombination reactions can have zero activation energy.
Detailed Solution
A reaction can have zero activation energy, for example, $\dot{C}H_3+\dot{C}H_3\rightarrow CH_3-CH_3$ has zero activation energy.