Alkyl halides react with dialkyl copper reagents (Gilman reagents) to give:

Which of the following statements is true in the case of alkyl halides?

Benzene $+ (CH_3CO)_2O$ $\xrightarrow{AlCl_3} X$ $\xrightarrow{Zn-Hg, HCl} Y$ $\xrightarrow{NBS} Z$;
$Z$ is

The compound $CH_3-C(OH)(CH_3)-CCl_3$ is:

What is the primary product of an $S_N1$ reaction on an optically active substance?

Hydrolysis of an alkyl bromide $X$ $(C_5H_{11}Br)$ follows first-order kinetics. Reaction of $X$ with $Mg$ in dry ether followed by treatment with $D_2O$ gives $Y$. What is $Y$?