JEE Main & Advanced Chemistry Haloalkanes and Haloarenes / हैलोएल्केन तथा हैलोएरीन्स Question Bank Properties of Halogen Containing Compounds

  • question_answer
    Which of the following reactions gives \[{{H}_{2}}C=C=C=C{{H}_{2}}\] [Roorkee Qualifying 1998]

    A) \[C{{H}_{2}}Br-CBr=C{{H}_{2}}\xrightarrow{Zn/C{{h}_{3}}OH}\]

    B) \[HC\equiv C-C{{H}_{2}}-COOH\underset{{{40}^{o}}C}{\mathop{\xrightarrow{Aq.{{K}_{2}}C{{O}_{3}}}}}\,\]

    C) \[C{{H}_{2}}Br-C\equiv C-C{{H}_{2}}Br\underset{\text{Heat}}{\mathop{\xrightarrow{Zn}}}\,\]

    D) \[2C{{H}_{2}}=CH-C{{H}_{2}}I\underset{{}}{\mathop{\xrightarrow{{}}}}\,\]

    Correct Answer: C

    Solution :

    \[C{{H}_{2}}Br-C\equiv C-C{{H}_{2}}Br\underset{\Delta }{\mathop{\xrightarrow{Zn}}}\,\]\[C{{H}_{2}}=C=C=C{{H}_{2}}\]


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