In the reaction $\mathrm{A} ightarrow \mathrm{B}+\mathrm{C}$, rate constant is $0.001$ $\mathrm{Ms}^{-1}$.…

In the reaction $\mathrm{A} ightarrow \mathrm{B}+\mathrm{C}$, rate constant is $0.001$ $\mathrm{Ms}^{-1}$. If we start with $1 \mathrm{M}$ of A then conc. of $\mathrm{A}$ and B after 10 minuter are respectively.
  1. $0.5 \mathrm{M}, 0.5 \mathrm{M}$
  2. $0.6 \mathrm{M}, 0.4 \mathrm{M}$
  3. $0.4 \mathrm{M}, 0.6 \mathrm{M}$
  4. $0.6 \mathrm{M} 0.5 \mathrm{M}$

Solution

$[\mathrm{A}]_{\mathrm{t}}=[\mathrm{A}]-\mathrm{kt}=1-0.001 \times 10 \times 60$
$=0.4 \mathrm{M}$
$[\mathrm{B}]_{\mathrm{t}}=0.001 \times 10 \times 60=0.6 \mathrm{M}$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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