(D) A zero order reaction is a multistep reaction.

(A) A first order reaction is always a single step reaction.

(B) A zero order reaction is a single step reaction.

(C) A second order reaction is always a multistep reaction.

JEE Main · 2020 · 03 Sep 2020 · Shift 1 · Chemical Kinetics

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It is true that:

(A)A first order reaction is always a single step reaction.
(B)A zero order reaction is a single step reaction.
(C)A second order reaction is always a multistep reaction.
(D)A zero order reaction is a multistep reaction.✓ Correct

Answer: (D)

Solution

The experimentally found order of a reaction need not equal its molecularity. A zero-order reaction, whose rate does not depend on reactant concentration, arises when some other step controls the rate, as on a saturated catalyst surface, so it is built from more than one step; a zero-order reaction is a multistep reaction.

JEE Main · 2020 · 03 Sep 2020 · Shift 1 · Single correct option

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