Question

Consider the following reactions: \[ X + \text{O}_2 \;\longrightarrow\; \text{Cu}_2\text{O} + \text{SO}_2 \] \[ \text{Cu}_2\text{O} + 2\,\text{H}_2 \;\longrightarrow\; 2\,\text{Cu} + \text{H}_2\text{O} \] If the molecule \(Y\) is formed in the first reaction, the shape of molecule \(Y\) is:

• A. Linear
• B. Tetrahedral
• C. Pyramidal
• D. Angular

Hint:

SO\(_2\) is often compared to O\(_3\) (ozone) in having a bent structure. - The electron pair arrangement is trigonal planar, but one region is a lone pair, giving a bent molecular shape.

Answer 1

The Correct Option is D

Step 1: Identify Molecule \(Y\) - In the reaction \(\text{X} + \text{O}_2 \rightarrow \text{Cu}_2\text{O} + \text{SO}_2\), the gas produced is \(\text{SO}_2\). - Therefore, \(Y\) is \(\text{SO}_2\). 

Step 2: Structure of \(\text{SO}_2\) - \(\text{SO}_2\) has a bent (or V-shaped) structure due to the presence of a lone pair on the sulfur atom and two S–O double bonds. - The bond angle is approximately \(119^\circ\), which makes it an \emph{angular} molecule. Hence, the shape of molecule \(Y\) (\(\text{SO}_2\)) is (angular).