For the sequence of reactions,A xrightarrow[{ | vedclass

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(C) The reaction of a Grignard reagent $(C_2H_5MgI)$ with a ketone $(A)$ followed by acid hydrolysis yields a tertiary alcohol.tert-Pentyl alcohol is

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Acetone

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(C) The reaction of a Grignard reagent $(C_2H_5MgI)$ with a ketone $(A)$ followed by acid hydrolysis yields a tertiary alcohol.tert-Pentyl alcohol is $CH_3-C(OH)(CH_3)(C_2H_5)$.To obtain this structure,the starting ketone $A$ must be $CH_3-CO-CH_3$ (Acetone).The reaction is: $CH_3-CO-CH_3 + C_2H_5MgI$ $\rightarrow CH_3-C(OMgI)(CH_3)(C_2H_5)$ $\xrightarrow{H_3O^{+}} CH_3-C(OH)(CH_3)(C_2H_5)$.

For the sequence of reactions,$A$ $\xrightarrow[{ether}]{{C_2H_5MgI}} B$ $\xrightarrow{{H_2O/H^{+}}}$ tert-Pentyl alcohol. The compound $A$ in the sequence is

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