Rate law for the reaction aA + bB cC + dD is r = k ,[A] ,[B], the rate of reaction doubles if

MHT CET 2025 Chemistry question

Rate law for the reaction aA + bB \rightarrow cC + dD is , the rate of reaction doubles if

(A)Concentration of both A and B are doubled.
(B)Concentration of A is doubled and concentration of B is kept constant.Correct
(C)Concentration of B is doubled and concentration of A is halved.
(D)Concentration of A is kept constant and concentration of B is halved.

Answer: (B)

The rate law is first order in A and first order in B, . Let the new rate be . (A) , : . (B) , constant: $r' =

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Question ID VK-102222