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NEET 2009
Exam
NEET
Year
2009
Subject
Chemistry
Chapter
Chemical Kinetics

NEET 2009 · Chemistry · Chemical Kinetics

Half-life period of a first-order reaction is 1386 seconds. The...

Half-life period of a first-order reaction is 1386 seconds. The specific rate constant of the reaction is :

Options

  1. A5.0×10−2 s−15.0 \times 10^{-2} \mathrm{~s}^{-1}
  2. B5.0×10−3 s−15.0 \times 10^{-3} \mathrm{~s}^{-1}
  3. C0.5×10−2 s−10.5 \times 10^{-2} \mathrm{~s}^{-1}
  4. D0.5×10−3 s−10.5 \times 10^{-3} \mathrm{~s}^{-1}

Correct answer

D. 0.5×10−3 s−10.5 \times 10^{-3} \mathrm{~s}^{-1}

Step-by-step solution

K=0.693t1/2=0.6931386=0.5×10−3 S−1\mathrm{K}=\frac{0.693}{\mathrm{t}_{1/2}}=\frac{0.693}{1386}=0.5 \times 10^{-3} \mathrm{~S}^{-1}
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