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in Chemical kinetics by (79.8k points)
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In a certain reaction 10% of the reactant decomposes in the first hour, 20% is second hour, 30% in third hour and so on. What are the dimensions of rate constant. 

(A) hour–1 

(B) mol lit–1 sec–1 

(C) lit mol–1 sec–1 

(D) mol sec–1

1 Answer

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Best answer

Correct Option (B) mol lit–1 sec–1

Explanation:

If the amount of products formed which is 10%, 20% and 30% is plotted against time i.e., 1 hr, 2 hr and 3 hr respectively, it is a straight line passing through the origin.

 it is a zero order reaction where x = kt ⇒ x/t =k

 dimensions of k = moles lit–1 sec–1

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