1.

Butylamine (I), diethylamine (II) and N, N-dimethylethylamine (III) have the same molar mass. The increasing order of their boiling points is

Answer»

`III lt II lt I`
`I lt II lt III`
`II lt III lt I`
`II lt I lt III`

Solution :Extent of H-bonding INCREASES as the number of H-atoms on the N-atoms increases and HENCE boiling points increases in the ORDER:
`3^(@) lt 2^(@) lt 1^(@), i.e., III lt II lt I`


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