A) \[HCHO\]
B) \[C{{H}_{3}}COC{{H}_{3}}\]
C) \[C{{H}_{3}}CHO\]
D) \[C{{H}_{3}}C{{H}_{2}}CHO\]
Correct Answer: C
Solution :
\[\underset{acetaldehyde}{\mathop{C{{H}_{3}}-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}\,=O}}\,+HCN\xrightarrow[{}]{{}}\underset{\begin{smallmatrix} acetaldehyde \\ cyanohydrin \end{smallmatrix}}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ CN \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-OH}}\,\] \[\xrightarrow[{}]{{{H}_{2}}O/{{H}^{+}}}\underset{lactic\text{ }acid}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ COHH \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-OH}}\,\]
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