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

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry8.1. Organic chemistry Nomenclature of organic compounds1 Mark
MCQ
The correct $IUPAC$ name of

$\begin{array}{*{20}{c}}
  {C{H_3} - C{H_2} - C - COOH} \\ 
  {\,\,\,\,\,\,\,\,||} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,C{H_2}} 
\end{array}$

is :

  • A
    $2-$methyl butanoic acid
  • ✓
    $2-$ethyl$-2-$propenoic acid
  • C
    $2-$carboxy$-1-$butene
  • D
    None of the above
✓

Answer

Correct option: B.
$2-$ethyl$-2-$propenoic acid
b
According to IUPAC rules, the priority order is Functional groups $- COOH$

Double bond at $2^{nd}$ position

No. of carbons in a chain $3$

So, the name of the compound is $2$-ethylprop-$2$-enoic acid.

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