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9. Amines — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry9. Amines1 Mark
MCQ
Primary nitro compounds when react with $HN{O_2}$ forms crystalline solids which on treatment with $NaOH$ gives
  • ✓
    Red solution
  • B
    Blue solution
  • C
    White precipitate
  • D
    Yellow 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} $

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