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In which of the following reactions, increase in temperature as well as decrease in pressure shift the
\( \mathrm{P} \)
equilibrium towards the forward direction?
(1) \( \mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_{2}(\mathrm{~g}) \)
\[
\Delta \mathrm{H}=+\mathrm{ve}
\]
(2) \( \mathrm{PCl}_{5}(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_{3}(\mathrm{~g})+\mathrm{Cl}_{2}(\mathrm{~g}) \)
\[
\Delta \mathrm{H}=+\mathrm{ve}
\]
(3) \( \mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g}) \)
\( \Delta \mathrm{H}=-\mathrm{ve} \)
(4) \( 2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_{3}(\mathrm{~g}) \quad \Delta \mathrm{H}=-\mathrm{ve} \)


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