A) \[{{C}_{2}}{{H}_{5}}-{{C}_{2}}{{H}_{5}}\]
B) \[{{C}_{2}}{{H}_{5}}COOH\]
C) \[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\]
D) \[{{C}_{2}}{{H}_{5}}CO{{C}_{2}}{{H}_{5}}\]
Correct Answer: D
Solution :
Cyanohydrins are prepared by the addition of HCN to carbonyl compound (aldehydes and ketones). \[\underset{\begin{smallmatrix} {{C}_{2}}{{H}_{5}} \\ \text{Pentanone} \end{smallmatrix}}{\mathop{\underset{|}{\mathop{{{C}_{2}}{{H}_{5}}C-C=O+HCN}}\,}}\,\xrightarrow{{}}\underset{\text{Pentanone}\,\text{cyanohydrin}}{\mathop{\underset{CN}{\overset{{{C}_{2}}{{H}_{5}}}{\mathop{\underset{|}{\overset{|}{\mathop{{{C}_{2}}{{H}_{5}}-C-OH}}}\,}}}\,}}\,\]
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