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A gaseous reaction $\mathrm{X}_{2}(\mathrm{~g}) \longrightarrow \mathrm{Y}+\frac{1}{2} \mathrm{Z}(\mathrm{g})$
There is increase in pressure from $100 \mathrm{~mm}$ to 120 $\mathrm{mm}$ in 5 minutes. The rate of disappearance of $\mathrm{X}_{2}$ is
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There is increase in pressure from $100 \mathrm{~mm}$ to 120 $\mathrm{mm}$ in 5 minutes. The rate of disappearance of $\mathrm{X}_{2}$ is
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The correct answer is:
$8 \mathrm{~mm} \mathrm{~min}^{-1}$
The increase in pressure shows the increase in conc. of $Z$. Rate of appearance of $Z=$
$$
\frac{120-100}{5}=4 \mathrm{~mm} \mathrm{~min}^{-1}
$$
Rate of disappearance of $\mathrm{X}_{2}=2 \times$ rate of appearance of $Z$ $=2 \times 4 \mathrm{~mm} \mathrm{~min}^{-1}=8 \mathrm{~mm} \mathrm{~min}^{-1}$
$$
\frac{120-100}{5}=4 \mathrm{~mm} \mathrm{~min}^{-1}
$$
Rate of disappearance of $\mathrm{X}_{2}=2 \times$ rate of appearance of $Z$ $=2 \times 4 \mathrm{~mm} \mathrm{~min}^{-1}=8 \mathrm{~mm} \mathrm{~min}^{-1}$
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