A xrightarrow{K_2Cr_2O_7 / text{dil. } H_2SO_ | vedclass

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(B) The final product is $tert$-butyl alcohol,which is a tertiary alcohol formed by the reaction of a ketone with a Grignard reagent.Step $1$: The rea

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$CH_3-CH(OH)-CH_3$

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(B) The final product is $tert$-butyl alcohol,which is a tertiary alcohol formed by the reaction of a ketone with a Grignard reagent.Step $1$: The reaction $B \xrightarrow{CH_3MgI / H_2O} CH_3-C(CH_3)(OH)-CH_3$ indicates that $B$ must be acetone $(CH_3-CO-CH_3)$.Step $2$: The reaction $A \xrightarrow{K_2Cr_2O_7 / 	ext{dil. } H_2SO_4} B$ shows that $A$ is an alcohol that oxidizes to acetone. Secondary alcohols oxidize to ketones.Therefore,$A$ is isopropyl alcohol $(CH_3-CH(OH)-CH_3)$.

$A$ $\xrightarrow{K_2Cr_2O_7 / \text{dil. } H_2SO_4} B$ $\xrightarrow{CH_3MgI / H_2O} CH_3-C(CH_3)(OH)-CH_3$. The reactant $A$ is:

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