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NEET 2015
Exam
NEET
Year
2015
Subject
Chemistry
Chapter
Chemical Kinetics

NEET 2015 · Chemistry · Chemical Kinetics

When initial concentration of a reactant is doubled in a reaction,...

When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is:

Options

  1. AZero
  2. BFirst
  3. CSecond
  4. DMore than zero but less than first

Correct answer

B. First

Step-by-step solution

t1/2∝1(a0)n−1{t}_{1/2} ∝ \dfrac{1}{{\left({a}_{0}\right)}^{n - 1}}

t1/2{t}_{1/2} is independent of initial concentration i.e.

t1/2∝1(a0)1−1{t}_{1/2} ∝ \dfrac{1}{{\left({a}_{0}\right)}^{1 - 1}} (is constant)

i.e n = 1 (order of reaction)
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