JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkyne

  • question_answer
    When acetylene is passed into dilute sulphuric acid containing \[H{{g}^{2+}}\] ions, the product formed is [DPMT 1996; Roorkee 1995; BHU 1998; KCET 1999; MP PET 1985, 86; DCE 1999; DPMT 1999, 2002; CPMT 1975, 82, 83, 90; MP PMT 1994, 97; CBSE PMT 1999; AIIMS 2002; CBSE PMT 1999; KCET (Med.) 1999, JIPMER 1999]

    A) Acetone

    B) Acetic acid

    C) Acetaldehyde

    D) Formaldehyde

    Correct Answer: C

    Solution :

               \[CH\equiv CH\underset{1%\ HgS{{O}_{4}}}{\mathop{\xrightarrow{40%\ {{H}_{2}}S{{O}_{4}}}}}\,\underset{\text{Vinyl alcohol}}{\mathop{C{{H}_{2}}=CH-OH}}\,\]\[\xrightarrow{\text{Rearrangement}}\ \underset{\text{Acetaldehyde}}{\mathop{C{{H}_{3}}-CHO}}\,\]


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