Q80 / 200 · NEET 2009 (Screening) · Chemistry

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

  • A
    $5.0 \times 10^{-3} \mathrm{~s}^{-1}$
  • B
    $0.5 \times 10^{-2} \mathrm{~s}^{-1}$
  • Correct answer
    C
    $0.5 \times 10^{-3} \mathrm{~s}^{-1}$
  • D
    $5.0 \times 10^{-2} \mathrm{~s}^{-1}$

Solution

Specific rate constant, $\mathrm{k}=\frac{0.693}{\mathrm{t}_{1 / 2}}=\frac{0.693}{1386}$ $$ =0.5 \times 10^{-3} \mathrm{~s}^{-1} $$

Hence, the correct answer is option: 'C'.

Relevant Questions