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8.1. Organic chemistry Nomenclature of organic compounds — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry8.1. Organic chemistry Nomenclature of organic compounds1 Mark
MCQ
The incorrect $IUPAC$ name is
  • ✓
    $\begin{array}{*{20}{c}}
      {C{H_3} - C - CH - C{H_3}} \\ 
      {||\,\,\,\,\,\,\,\,\,|\,\,\,\,\,} \\ 
      {\,\,\,\,O\,\,\,\,\,\,\,C{H_3}\,\,} 
    \end{array}$                 $2-$ methyl $-3-$ butanone
  • B
    $\begin{array}{*{20}{c}}
      {C{H_3} - CH - CH - C{H_3}} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,} \\ 
      {\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,C{H_2}C{H_3}} 
    \end{array}$             $2, 3 -$ dimethylpentane
  • C
    $C{H_3} - C \equiv CCH{(C{H_3})_2}$            $4-$ methyl $-2-$ pentyne
  • D
    $\begin{array}{*{20}{c}}
      {C{H_3} - CH - CH - C{H_3}} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,} \\ 
      {Cl\,\,\,\,\,\,\,\,\,Br} 
    \end{array}$             $3-$ chloro $-2-$ bromobutane
✓

Answer

Correct option: A.
$\begin{array}{*{20}{c}}
  {C{H_3} - C - CH - C{H_3}} \\ 
  {||\,\,\,\,\,\,\,\,\,|\,\,\,\,\,} \\ 
  {\,\,\,\,O\,\,\,\,\,\,\,C{H_3}\,\,} 
\end{array}$                 $2-$ methyl $-3-$ butanone
a
$\begin{array}{*{20}{c}}
  {\mathop C\limits^1 {H_3} - \mathop C\limits^2  - \mathop C\limits^3 H - \mathop C\limits^4 {H_3}} \\ 
  {\,\,\,||{\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,{\mkern 1mu} {\mkern 1mu} |\,\,\,\,\,\,\,\,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} } \\ 
  {{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} O{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} \,\,\,C{H_3}\,\,\,{\mkern 1mu} {\mkern 1mu} } 
\end{array}$                 $ 3-$ Methyl $-2-$ butanone

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