1.

Under which of the following reaction conditions, aniline gives p-nitro derivative as the major product?

Answer»

Acetyl chloride/pyridine followed by reaction with conc. `H_(2)SO_($)+conc.HNO_(3)`
ACETIC anhydride/pyridine followed by conc. `H_(2)SO_(4)+conc.HNO_(3)`.
Dil. HCL followed by reaction with conc. `H_(2)SO_(4)+conc.HNO_(3)`
Reaction with conc. `HNO_(3)+conc.H_(2)SO_(4)`.

Solution :
(c) `C_(6)H_(5)NH_(2)overset(Dil.HCl)to C_(6)H_(5) overset(+)(N)H_(3)underset(+conc.H_(2)SO_(4))overset(conc.HNO_(3))tom-NO_(2)-C_(6)H_(4)-overset(+)(N)H_(3)`
(d) With conc. `HNO_(3)+conc.H_(2)SO_(4)`, aniline is oxidised to form tarry products.
thus, options (a) and (B) are correct.


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