In which of the following reactions is a primary amine not obtained as a product?

Aniline dissolved in dilute $HCl$ is reacted with sodium nitrite at $0\,^oC$. This solution was added dropwise to a solution containing an equimolar mixture of aniline and phenol in dilute $HCl$. The structure of the major product is

Which of the following compounds gives an even number of Hoffmann's exhaustive methylation and elimination cycles?

The product $A$ formed in the following reaction is:

$A$ student performed an analysis of an aliphatic organic compound '$X$' which,upon analysis,gave $C=61.01\%$,$H=15.25\%$,$N=23.74\%$. This compound,on treatment with $HNO_2/H_2O$,produced another compound '$Y$' which did not contain any nitrogen atom. However,the compound '$Y$' upon controlled oxidation produced another compound '$Z$' that responded to the iodoform test. The structure of '$X$' is:

In the given set of reactions,the $IUPAC$ name of product '$Y$' is:
$2-\text{Bromopropane}$ $\xrightarrow[\text{alc. / heat}]{AgCN} X$ $\xrightarrow{LiAlH_4} Y$