The reaction shown below proceeds via which mechanism?

The major product of the following reaction is

What is the characteristic odor of nitrobenzene?

Which one of the following will most readily be dehydrated in acidic condition?

Toluene $\xrightarrow[(2) \ H_3O^{+}]{(1) \ CrO_2Cl_2 / CS_2} X$ $\xrightarrow{\text{Conc. } NaOH} Y + Z$. The correct statements about $Y$ and $Z$ are:
$A. \quad Y$ is a secondary alcohol
$B. \quad Y$ is the reduction product of $X$
$C. \quad Z$ on heating with soda lime gives benzene
$D. \quad Y$ does not give $H_2$ gas with $Na$ metal

Which of the following is reacted with benzaldehyde to obtain $1-$phenylethanol?