Q28 / 160 · TS EAMCET 2022 (18 Jul Shift 2) · Chemistry

The main products $P$ and $Q$ of the following unbalanced disproportionation reaction are
${Se}_{2} {Cl}_{2} \to P + Q$

A
$\begin{matrix} P & Q \\ {SeCl}_{2} & {SeCl}_{3} \end{matrix}$
B
$\begin{matrix} P & Q \\ {SeCl}_{4} & {SeCl}_{2} \end{matrix}$
Correct answer
C
$\begin{matrix} P & Q \\ {SeCl}_{4} & Se \end{matrix}$
D
$\begin{matrix} P & Q \\ {SeCl}_{4} & {Se}_{2} \end{matrix}$

Solution

The monohalides of 16th group elements are dimeric in nature. These dimeric halides undergo disproportionation as given below:
$2 {Se}_{2} {Cl}_{2} \overset{∆}{\to} {SeCl}_{4} + 3 Se$
*NOTE: For academic correctness the question was changed from dihalide to mono halide.

Hence, the correct answer is option: 'C'.

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