Which of the following reactions is not correct?
- $\mathrm{CH}_2 \mathrm{Br}-\mathrm{CH}_2 \mathrm{Br} \stackrel{\mathrm{Zn}}{\longrightarrow} \mathrm{CH}_2=\mathrm{CH}_2$
- $\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{C}-\mathrm{H} \underset{\mathrm{H}_2 \mathrm{O}}{\mathrm{Hg}^{+2}, \mathrm{H}^{+}} \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CHO}$
- $\mathrm{Ph}-\mathrm{CH}_2-\mathrm{Br} \underset{\text { Dry ether }}{\longrightarrow} \mathrm{Ph}-\left(\mathrm{CH}_2\right)_2-\mathrm{Ph}$
Solution
Asked in: AP EAMCET 2023 (18 May Shift 2)