For a first-order reaction,it takes $20 \, \text{min}$ for the concentration to decrease from $1 \, M$ to $0.6 \, M$. How much time is required for the concentration to decrease from $0.6 \, M$ to $0.36 \, M$?

  • A
    More than $20 \, \text{min}$
  • B
    Less than $20 \, \text{min}$
  • C
    Exactly $20 \, \text{min}$
  • D
    Infinite

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The following data were obtained during the first order thermal decomposition of $SO_{2}Cl_{2}$ at a constant volume.
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ExperimentTime $/$ $s$Total pressure $/$ $atm$
$1$$0$$0.5$
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Difficult
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For a first order reaction $A \rightarrow B$,the rate constant,$k = 5.5 \times 10^{-14} \, s^{-1}$. The time required for $67 \, \%$ completion of reaction is $x \times 10^{-1}$ times the half life of reaction. The value of $x$ is $....$ (Nearest integer)

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