$(CH_3)_2CHOH$ $\xrightarrow{dil. \, [O]} X$ $\xrightarrow[(ii) \, H_2O]{(i) \, CH_3MgBr} Y$. What is $Y$ here?

Give the structures of the products you would expect when each of the following alcohols reacts with $(a)$ $HCl - ZnCl_{2}$,$(b)$ $HBr$,and $(c)$ $SOCl_{2}$: $(i)$ $Butan-1-ol$,$(ii)$ $2-Methylbutan-2-ol$.

The conversion of $2-$methylpropan$-1-$ol to $2-$methylpropan$-2-$ol is:

The major product of the following reaction is:

Major product of the reaction is

When a Grignard reagent reacts with $(B)$,product $(D)$ is obtained. Reactant $(A)$ of the above reaction is:
$(A)$ $\xrightarrow{PBr_3} (C)$ $\xrightarrow{Mg, \text{ether}} \text{Grignard reagent}$
$(A) \xrightarrow{Na_2Cr_2O_7, H_2SO_4} (B)$
$\text{Grignard reagent} + (B) \to (D) \xrightarrow{H_3O^\oplus} (3,4-\text{dimethylhexan-3-ol})$