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Question

(B) The reaction of a Grignard reagent with a carbonyl compound followed by hydrolysis produces an alcohol.$Z$ reacts with conc. $HCl$ at room tempera

Vedclass · Accepted Answer

$CH_3MgBr, CH_3COCH_3$

Vedclass · Answer

(B) The reaction of a Grignard reagent with a carbonyl compound followed by hydrolysis produces an alcohol.$Z$ reacts with conc. $HCl$ at room temperature to give immediate turbidity,which is the characteristic test for a tertiary $(3^{\circ})$ alcohol (Lucas test).Among the options,the reaction of $CH_3MgBr$ $(X)$ with $CH_3COCH_3$ $(Y)$ produces $tert$-butyl alcohol,which is a tertiary alcohol.The reaction is: $CH_3MgBr + CH_3COCH_3$ $\rightarrow (CH_3)_3COMgBr$ $\xrightarrow{H_3O^+} (CH_3)_3COH$.Thus,the correct option is $B$.

$A$ Grignard reagent $(X)$ on reaction with a carbonyl compound $(Y)$ followed by hydrolysis gives $Z$. $Z$ reacts with conc. $HCl$ at room temperature to give immediate turbidity. $X$ and $Y$ respectively are:

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