JEE Main & Advanced Chemistry Aldehydes, Ketones Question Bank Introduction

  • question_answer
    Reaction of acetaldehyde with HCN followed by hydrolysis gives a compound which shows         [MP PET 1997]

    A)                 Optical isomerism           

    B)                 Geometrical isomerism

    C)                 Metamerism     

    D)                 Tautomerism

    Correct Answer: A

    Solution :

               \[\underset{\text{Acetaldehyde}}{\mathop{C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-H}}\,+\underset{\begin{smallmatrix}  \text{Hydrogen} \\  \text{Cyanide} \end{smallmatrix}}{\mathop{HCN}}\,\xrightarrow{{}}\underset{\begin{smallmatrix}  \text{Acetaldehyde} \\  \text{Cynohydrin} \end{smallmatrix}}{\mathop{\overset{\,\,\,\,\,\,\,OH}{\mathop{\overset{\,\,\,\,\,|}{\mathop{\underset{\,\,\,\,\,\,\,\,\,CN}{\mathop{\underset{\,\,\,\,\,\,\,|}{\mathop{C{{H}_{3}}-C-H}}\,}}\,}}\,}}\,}}\,\]  (Optically active)


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