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Topic Question Set

Q 1 :

The number of incorrect statement/s from the following is ______.          [2023]

A. The successive half-lives of zero-order reactions decrease with time.

B. A substance appearing as reactant in the chemical equation may not affect the rate of reaction.

C. Order and molecularity of a chemical reaction can be a fractional number.

D. The rate constant units of zero and second order reaction are mol L-1s-1 and mol-1 L s-1 respectively.



(1)

(A) For zero order, t1/2=[A0]2K, as time decreases, concentration decreases and hence, half-life decreases. (correct)

(B) If order w.r.t. that reactant is zero, then it will not affect the rate of reaction. (correct)

(C) Order can be fractional but molecularity cannot be. (Incorrect)

(D) Unit of K=(mol)1-nLtn-1s-1

                  n=0, K=mol L-1s-1; n=2, K=mol-1Lt s-1. (correct)