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JIPMER 2006
Exam
JIPMER
Year
2006
Subject
Chemistry
Chapter
Chemical Kinetics

JIPMER 2006 · Chemistry · Chemical Kinetics

The half-life of a first order reaction having rate constant k=1.7...

The half-life of a first order reaction having rate constant k=1.7×10−5 s−1k=1.7 \times 10^{-5} \mathrm{~s}^{-1} is :

Options

  1. A12.1 h
  2. B9.7 h
  3. C11.3 h
  4. D1.8 h

Correct answer

C. 11.3 h

Step-by-step solution

k=1.7×10−5 s−1t1/2=0.693k=0.6931.7×10−5=11.3 h\begin{aligned} & k=1.7 \times 10^{-5} \mathrm{~s}^{-1} \\ & t_{1/2}=\frac{0.693}{k}=\frac{0.693}{1.7 \times 10^{-5}}=11.3 \mathrm{~h}\end{aligned}
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