JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkyne

  • question_answer
    What is the end product of the following sequences of operations \[Ca{{C}_{2}}\xrightarrow{{{H}_{2}}O}A\underset{H{{g}^{++}}}{\mathop{\xrightarrow{\text{dil}\text{. }{{H}_{2}}S{{O}_{4}}}}}\,B\underset{{{H}_{2}}}{\mathop{\xrightarrow{Ni}}}\,C\] [CPMT 1978; MP PMT 1996]

    A) Methyl alcohol

    B) Acetaldehyde

    C) \[{{C}_{2}}{{H}_{5}}OH\]

    D) \[{{C}_{2}}{{H}_{4}}\]

    Correct Answer: C

    Solution :

               \[Ca{{C}_{2}}\xrightarrow{{{H}_{2}}O}\underset{\text{Acetylene}}{\mathop{HC\equiv CH}}\,\underset{H{{g}^{+2}}}{\mathop{\xrightarrow{Dil.\,{{H}_{2}}S{{O}_{4}}}}}\,\underset{\text{Acetaldelyde}}{\mathop{C{{H}_{3}}CHO}}\,\] \[\underset{{{H}_{2}}}{\mathop{\xrightarrow{Ni}}}\,\underset{\text{Ethyl}\,\text{alcohol}}{\mathop{C{{H}_{3}}C{{H}_{2}}-OH}}\,\]


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