Q. Which of the following statement are correct?

Amines Report Error

$3^{\circ}$ nitro compound does not react with $HNO _{2}$.

$2^{\circ}$ nitro compound with $HNO _{2}$ gives pseudo nitrole, which gives blue colour with base.

$1^{\circ}$ nitro compound with $HNO _{2}$ gives nitrolic acid, which gives blood-red colour with base.

$1^{\circ}, 2^{\circ}$, and $3^{\circ}$ nitro compounds can be distinguished by $HNO _{2}$.

Solution:

Correct answer is (a) $3^{\circ}$ nitro compound does not react with $HNO _{2}$.Correct answer is (b) $2^{\circ}$ nitro compound with $HNO _{2}$ gives pseudo nitrole, which gives blue colour with base.Correct answer is (c) $1^{\circ}$ nitro compound with $HNO _{2}$ gives nitrolic acid, which gives blood-red colour with base.Correct answer is (d) $1^{\circ}, 2^{\circ}$, and $3^{\circ}$ nitro compounds can be distinguished by $HNO _{2}$.

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