Two substances A and B react with each other in such a way that one-half of A remains after 25 min and one-fourth of A remains after 50 min.Doubling the concentration of B while keeping the concentration of A fixed doubles the rate of the reaction.This reaction is
A) first-order in both A and B.
B) zero-order in both A and B.
C) second-order in A and first-order in B.
D) first-order in A and second-order in B.
E) second-order in both A and B.
Correct Answer:
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