Q21 / 90 · JEE Main 2015 (04 Apr) · Chemistry
In the reaction,

The product is

The product is
- A

- B

- C

- Correct answerD

Solution
Firstly, the given compound is treated with dilute hydrochloric acid with an aqueous solution of sodium nitrite at low temperature to give benzene diazonium chloride product, this reaction is known as diazotisation reaction. Now, the obtained product is heated with anhydrous cuprous cyanide, the halogen atom is replaced by cyano group.

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