Give a chemical test and the reagents used to distinguish between the following :
'Ethylamine and diethylamine'

Explanation

Test with benzene suphobnly chloride `(C_6H_5SO_2Cl)` Ethylamine (primary amine ) froms N-ethyl benzen supphonamide whtih dissolves in `KOH` because ot the presence of an acidic hydrogen on the (N) atom. On the toher hand diethluy amine (secondary amine ) froms N,N-diethyl benzene sulphonamide , which does not idissolve in `KOH` due to the absence of acidic gydrgoen on (N) atom.