Equilibrium Ques 25
25. In a two-step exothermic reaction
$ \mathrm{A} 2(\mathrm{~g})+\mathrm{B} 2(\mathrm{~g}) \underset{\text { Step 1 }}{\rightleftharpoons} 3 \mathrm{C}(\mathrm{g}) \underset{\text { Step 2 }}{\rightleftharpoons} \mathrm{D}(\mathrm{g}) $
Steps $1$ and $2$ are favoured respectively by
[1997]
(a) high pressure, high temperature and low pressure, low temperature
(b) high pressure, low temperature and low pressure, high temperature
(c) low pressure, high temperature and high pressure, high temperature
(d) low pressure, low temperature and high pressure, low temperature
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Answer:
Correct Answer: 25.(d)
Solution: (d) $\mathrm{A}_2(\mathrm{~g})+\mathrm{B}_2(\mathrm{~g}) \underset{\text { Step 1 }}{\rightleftharpoons} 3 \mathrm{C}(\mathrm{g}) \underset{\text { Step 2 }}{\rightleftharpoons} \mathrm{D}(\mathrm{g})$
since the steps $1$ and $2$ are exothermic hence low temprature will favour both the reactions. In step - $1$ , moles are increasing hence low pressure will favour it. In step $2$, moles are decreasing, hence high pressure will favour it.
BETA
