Nitrobenzene on reduction with zinc and $NH_4Cl$ gives:

Arrange the given amines in decreasing order of their basicity.

Benzene diazonium chloride on reaction with aniline in a mild alkaline medium forms:

Deamination (or) diazotization of $n$-butylamine $(CH_3CH_2CH_2CH_2NH_2)$ with $NaNO_2/HCl$ gives how many isomeric butenes?

$CH_3COOH$ $\xrightarrow[\Delta ]{NH_3} X$ $\xrightarrow{NaOBr} Y$ $\xrightarrow{NaNO_2 + HCl} Z$. What is $Z$?

The final major product of the following reaction is: