🧪 Chemistry · Chemical Kinetics · NEET & JEE

The rate of a reaction increases by a factor of about 2.83 (2 times root 2) when the reactant concentration is doubled. The order with respect to that reactant is:

Answer: 1.5.

A 1
B 1.5
C 2
D 0.5

Correct answer: B. 1.5

Explanation: If rate is proportional to [A]<sup>n</sup>, then 2<sup>n</sup> = 2.83, giving n = 1.5 (a fractional order).

First-order decay curve: concentration halves every t½, and that half-life is constant - a defining test for first-order kinetics.

Concept context

Study the speed of reactions and what affects it: concentration, temperature, and catalysts. Covers rate law, order of reaction, the Arrhenius equation, and reaction mechanisms step by step.

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The rate of a reaction increases by a factor of about 2.83 (2 times root 2) when the reactant concentration is doubled. The order with respect to that reactant is:

Concept context

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