10. Biomolecules — Chemistry STD 12 Science — Question

$H_{2(g)} + 2ICl_{(g)} \rightarrow 2HCl_{(g)} + I_{2(g)}$

This reaction is of first order with respect to $H_{2(g)}$ and $ICl_{(g)},$

following mechanisms were proposed.

Mechanism $A\, :$

$H_{2(g)} + 2ICl_{(g)} \rightarrow 2HCl_{(g)} + I_{2(g)}$

Mechanism $B\, :$

$H_{2(g)} + ICl_{(g)} \rightarrow HCl_{(g)} + HI_{(g)}\, ;$     slow

$HI_{(g)} + ICl_{(g)} \rightarrow HCl_{(g)} + I_{2(g)} \,;$      fast

Which of the above mechanism(s) can beconsistent with the given information about the reaction ?

$A.$ $E _{\text {cell }}$ is an intensive parameter.

$B.$ A negative $E^{\Theta}$ means that the redox couple is a stronger reducing agent than the $H ^{+} / H _2$ couple.

$C.$ The amount of electricity required for oxidation or reduction depends on the stoichiometry of the electrode reaction.

$D.$ The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte.