1.

N_(2) gas will not be evolved upon reaction of HNO_(2) with which of the following amines

Answer»

`1^(@)`
`2^(@)`
`3^(@)`
Both B and c

Solution :Primary amines form alcohols with nitrous ACID `(NaNO_(2)+HCl)`. Nitrogen gas (with brisk effervescence) is eleminated and clear solution is obtained which is not so in the CASE of SECONDARY and tertiary amines.
`underset(1^(@)"amine")(RNH_(2))+HONOrarrunderset("Alcohol")(ROH)+N_(2)uparrow+H_(2)O`
`underset(2^(@)"amine")(R_(2)NH)+HONOrarrunderset("N-Nitrosodialkylamine")(R_(2)N NO+H_(2)O)`


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