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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 ~s . The...

Half-life period of a first order reaction is 1386 s1386 \mathrm{~s}. The specific rate constant of the reaction is

Options

  1. A5.0×10−3 s−15.0 \times 10^{-3} \mathrm{~s}^{-1}
  2. B0.5×10−2 s−10.5 \times 10^{-2} \mathrm{~s}^{-1}
  3. C0.5×10−3 s−10.5 \times 10^{-3} \mathrm{~s}^{-1}
  4. D5.0×10−2 s−15.0 \times 10^{-2} \mathrm{~s}^{-1}

Correct answer

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

Step-by-step solution

Specific rate constant, k=0.693t1/2=0.6931386\mathrm{k}=\frac{0.693}{\mathrm{t}_{1/2}}=\frac{0.693}{1386} =0.5 ×\times10^{-3}  s−1\mathrm{~s}^{-1}
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