An organic amino compound reacts with aqueous nitrous acid at low temperature to produce an oily nitroso amine. The compound is:

Which of the following would produce an alcohol on treatment with $NaNO_2$ and $HCl$ in the presence of water?

$A$ primary amine,$RNH_2$ can be reacted with $CH_3-X$ to get a secondary amine,$RNHCH_3$,but the disadvantage is that $3^o$ amine and quaternary ammonium salts are also obtained as side products. Can you suggest a method where $RNH_2$ forms only $2^o$ amine?

When an organic compound was treated with sodium nitrite and hydrochloric acid in the ice-cold condition,nitrogen gas was evolved copiously. The compound is

In the following compounds,the decreasing order of basic strength will be:

How can aniline be purified?