Question

Select the correct statements regarding the final product (Y) :

• A. It can be identified with neutral $FeC{l}_3$ solution
• B. On treatment with Zn-dust it yields a product having degree of unsaturation = 4
• C. It undergoes coupling reaction with benzene diazonium chloride at low temperature (0 - $5^{\circ }C$) in slightly basic medium
• D. It liberates $H_2$ gas with Na

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A It can be identified with neutral $FeC{l}_3$ solution
B On treatment with Zn-dust it yields a product having degree of unsaturation = 4
C It undergoes coupling reaction with benzene diazonium chloride at low temperature (0 - $5^{\circ }C$) in slightly basic medium
D It liberates $H_2$ gas with Na

The product $Y$ of reaction is $Phenol\left(C_6{H}_{5}OH\right)$.

Phenol can be identified with neutral $FeC{l}_3$ solution as it gives violate coloured solution.

On treatment with Zn-dust it yields a product Benzene $\left(C_6{H}_6\right)$ which is having degree of unsaturation $=4(\Rightarrow \frac{2C+2-H}{2}=\frac{12+2-6}{2}=4)$

It undergoes coupling reaction with benzene diazonium chloride at low temperature $(0-5^{\circ }C)$ in slightly basic medium.

It liberates $H_2$ gas with $Na$.

$C_6{H}_{5}OH+Na\to C_6{H}_5{O}^{-}N{a}^{+}+H_2$