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Solution


Q.

Given below are some nitrogen containing compounds.

Each of them is treated with HCl separately. 1.0 g of the most basic compound will consume ______ mg of HCl.

(Given molar mass in g mol-1: C = 12, H = 1, O = 16, Cl = 35.5)                       [2025]

Ans.

(341)

In aromatic amines, lone pair of N is delocalized due to resonance. Hence aromatic amines are less basic than aliphatic amines. Thus benzyl amine is most basic as it is aliphatic amine and rest all amines are aromatic amines.

C6H5CH2NH2+HCl→C6H5CH2NH3+Cl-

1 mol of C6H5CH2NH2 reacts with 1 mol of HCl.

i.e. [7×12+9×1+1×14] g=107 g C6H5CH2NH2 reacts with 36.5 g HCl

1 g of C6H5CH2NH2 reacts with 36.5107 g HCl

=0.34112 g HCl=341.12 mg HCl