331. The $$C - H$$ bond distance is the longest in :
A
$${C_2}{H_2}$$
B
$${C_2}{H_4}$$
C
$${C_2}{H_6}$$
D
Answer :
$${C_2}{H_6}$$
332. Which of the following compounds is not correctly matched with its IUPAC name?
A
$$C{H_3}C{H_2}C{H_2}COOC{H_2}C{H_3};$$ $${\text{Ethyl butanoate}}$$
B
\[C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\,\, \\
C{{H}_{3}}\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,C{{H}_{2}}-CHO;\] $${\text{3 - Methylbutanal}}$$
C
\[C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\,\,\, \\
C{{H}_{3}}\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,\underset{\begin{smallmatrix}
\parallel \\
O
\end{smallmatrix}}{\mathop{C}}\,-C{{H}_{2}}C{{H}_{3}};\] $$2{\text{ - Methylpentan - 3 - one}}$$
D
\[C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\,\, \\
OH\,\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,\underset{\begin{smallmatrix}
|\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{3}}\,\,\,\,\,\,\,
\end{smallmatrix}}{\mathop{CH-}}\,C{{H}_{3}};\] $${\text{2 - Methylbutan - 3 - ol}}$$
Answer :
\[C{{H}_{3}}\underset{\begin{smallmatrix}
|\,\,\,\,\,\, \\
OH\,\,\,\,
\end{smallmatrix}}{\mathop{-CH-}}\,\underset{\begin{smallmatrix}
|\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{3}}\,\,\,\,\,\,\,
\end{smallmatrix}}{\mathop{CH-}}\,C{{H}_{3}};\] $${\text{2 - Methylbutan - 3 - ol}}$$
