Question

The reaction of Grignard reagent,${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{MgBr}$ with ${\mathrm{C}}_8{\mathrm{H}}_8\mathrm{O}$followed by hydrolysis gives compound “A” which reacts instantly with Lucas reagent to give compound B, ${\mathrm{C}}_{10}{\mathrm{H}}_{13}\mathrm{Cl}$. The Compound B is:

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

The explanation for the correct option:

Option (D):

1. The given compound ${\mathrm{C}}_8{\mathrm{H}}_8\mathrm{O}$ is a ketone. The reaction of Grignard reaction with ketone gives tertiary alcohol.
2. The resulting alcohol will undergo a Lucas test i.e. the alcohol will react with Lucas reagent(concentrated hydrochloric acid with Zinc chloride) to form chloroalkane.

Therefore, the compound B is