MHT CET Chemistry question

According to the collision theory of chemical reactions,

(A)Every molecular collision leads to a chemical reaction
(B)Rate is directly proportional to the number of effective collisions per secondCorrect
(C)Gas phase reactions are always of zero order
(D)Rates of reactions are of the order of molecular speeds

Answer: (B)

Solution

Only effective collisions (sufficient energy and proper orientation) lead to products, so the rate is proportional to the number of effective collisions per second; not

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Question ID VK-068995