- ✓

- B

- C

- D






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$[A]$ $I$ and $III$ follow $\mathrm{S}_{\mathrm{N}} 1$ mechanism
$[B]$ $I$ and $II$ follow $\mathrm{S}_{\mathrm{N}} 2$ mechanism
$[C]$ Compound $IV$ undergoes inversion of configuration
$[D]$ The order of reactivity for $I$, $III$ and $IV$ is: $IV$ $>$ $I$ $>$ $III$

$2H_2(g) + O_2(g) \to 2H_2O(l)$ ; $\Delta _fH^o_{298}(H_2O(l)) = -285.5\, kJ/mol$
What is $\Delta S^o_{298}$ for the given fuel cell reaction ?
Given $: O_2(g) + 4H^+(aq) + 4e^- \to 2H_2O(l)$ $E^o = 1.23\, V$
$S{O_2}C{l_2}(g) \rightleftharpoons S{O_2}(g) + C{l_2}(g)$
$CO(g) + C{l_2}(g) \rightleftharpoons COC{l_2}(g)$
on adding more $SO_2$ at equilibrium what will happen?