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(B) The given reaction is the addition of a Grignard reagent to a ketone (acetone) followed by acidic hydrolysis to form a tertiary alcohol.The reacta

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$CH_3MgBr$

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(B) The given reaction is the addition of a Grignard reagent to a ketone (acetone) followed by acidic hydrolysis to form a tertiary alcohol.The reactant is acetone $(CH_3COCH_3)$ and the product is $2$-methylpropan-$2$-ol $((CH_3)_3COH)$.The reaction is: $CH_3COCH_3 + CH_3MgBr$ $\rightarrow (CH_3)_3COMgBr$ $\xrightarrow{H_3O^+} (CH_3)_3COH + Mg(OH)Br$.Therefore,the required Grignard reagent is $CH_3MgBr$.

Identify the suitable reagent for the reaction given below.
$CH_3-CO-CH_3 \xrightarrow[(ii) H_3O^+]{(i) ?} (CH_3)_3C-OH$

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Identify the suitable reagent for the reaction given below.$CH_3-CO-CH_3 \xrightarrow[(ii) H_3O^+]{(i) ?} (CH_3)_3C-OH$