Question

Primary nitro compounds when react with $HNO_{2}$ forms crystalline solids which on treatment with NaOH gives

• A. Red solution
• B. Blue solution
• C. White precipitate
• D. Yellow colouration

Answer 1

Answer: (A)

Red solution

Answer 2

$\underset{1^{o}\text{nitro}}{R - CH_{2} - NO_{2}}\overset{\quad HNO_{2}\quad}{\rightarrow}\underset{\text{Nitroloic acid}}{R - \underset{N - OH}{\underset{||}{C} - NO_{2}}}$

$\overset{\quad NaOH\quad}{\rightarrow}\underset{(\text{Blood red})}{\underset{N - O^{-}Na^{+}}{\underset{||}{R - C} - NO_{2}}}$