Alkyl benzene sulphonates can be used as detergents in hard water,unlike soaps,as

Choose the correct order of basicity of the following compounds in the aqueous phase:
$(A)$ $(C_2H_5)_2NH$
$(B)$ $C_2H_5NH_2$
$(C)$ $NH_3$
$(D)$ $C_6H_5NH_2$

Which amine will not react with nitrous acid $(HNO_2)$?

Predict the reagents or products $(1)$ to $(5)$ in the following reaction sequence:
$p-Nitrotoluene$ $\xrightarrow{(1)} p-Toluidine$ $\xrightarrow{(CH_3CO)_2O/\text{Pyridine}} p-Acetotoluidide$ $\xrightarrow{HNO_3/H_2SO_4} (2)$ $\xrightarrow{(3)} (4)$ $\xrightarrow{(5)} 3-Nitrotoluene$

Which foul-smelling substance is formed when methylamine reacts with chloroform and ethanolic caustic alkali?

The compound $X$ $(C_7H_9N)$ reacts with benzenesulfonyl chloride to give $Y$ $(C_{13}H_{13}NO_2S)$ which is insoluble in alkali. The compound $X$ is