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  3. Chemistry
  4. The half-life of a first order reaction having rate constant k=1.7 × 10-5 s -1 is :

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Q. The half-life of a first order reaction having rate constant $k=1.7 \times 10^{-5} s ^{-1}$ is :

JIPMERJIPMER 2006Chemical Kinetics

Solution:

$k=1.7 \times 10^{-5} s ^{-1}$
$t_{1 / 2}=\frac{0.693}{k}=\frac{0.693}{1.7 \times 10^{-5}}$
$=11.3\, h$