MCQ
Primary nitro compounds when react with $HN{O_2}$ forms crystalline solids which on treatment with $NaOH$ gives
- ✓Red solution
- BBlue solution
- CWhite precipitate
- DYellow colouration
✓
Answer
Correct option: A.
Red solution
a
(a)$\mathop {R - C{H_2} - N{O_2}}\limits_{{1^o}{\text{nitro}}} {\mkern 1mu} \xrightarrow{{HN{O_2}}}$ $\mathop {\begin{array}{*{20}{c}}
{R - C - N{O_2}} \\
{||\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,N - OH}
\end{array}}\limits_{{\text{Nitroloic acid}}} {\mkern 1mu} $ $\xrightarrow{{NaOH}}$ $\mathop {\begin{array}{*{20}{c}}
{R - C - N{O_{2\,}}\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,N - {O^ - }N{a^ + }}
\end{array}}\limits_{{\text{(Blood red)}}} {\mkern 1mu} $
(a)$\mathop {R - C{H_2} - N{O_2}}\limits_{{1^o}{\text{nitro}}} {\mkern 1mu} \xrightarrow{{HN{O_2}}}$ $\mathop {\begin{array}{*{20}{c}}
{R - C - N{O_2}} \\
{||\,\,\,\,\,\,} \\
{\,\,\,\,\,\,\,N - OH}
\end{array}}\limits_{{\text{Nitroloic acid}}} {\mkern 1mu} $ $\xrightarrow{{NaOH}}$ $\mathop {\begin{array}{*{20}{c}}
{R - C - N{O_{2\,}}\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,N - {O^ - }N{a^ + }}
\end{array}}\limits_{{\text{(Blood red)}}} {\mkern 1mu} $
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