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The reaction

$2 \mathrm{~N}_{2} \mathrm{O}_{5}(\mathrm{~g}) \rightarrow 4 \mathrm{NO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g})$

follows first order kinetics. The pressure of a vessel containing only $\mathrm{N}_{2} \mathrm{O}_{5}$ was found to increase from $50 \mathrm{~mm} \mathrm{Hg}$ to $87.5 \mathrm{~mm} \mathrm{Hg}$ in $30 \mathrm{~min}$. The pressure exerted by the gases after $60 \mathrm{~min}$. will be (Assume temperature remains constant)

  1. $106.25 \mathrm{~nm} \mathrm{Hg}$

  2. $116.25 \mathrm{~nm} \mathrm{Hg}$

  3. $125 \mathrm{~mm} \mathrm{Hg}$

  4. $150 \mathrm{~mm} \mathrm{Hg}$

Correct Option: , 2


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