Haryana PMT Haryana PMT Solved Paper-2001

  • question_answer
    A gas decolourises bromine in \[CC{{l}_{4}}\] and forms a precipitate with ammonical silver nitrate. The  gas is:

    A)  \[C{{H}_{4}}\]                  

    B)  \[{{C}_{2}}{{H}_{6}}\]

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

    D)  \[{{C}_{2}}{{H}_{2}}\]

    Correct Answer: D

    Solution :

                    Both \[{{C}_{2}}{{H}_{2}}\]and \[{{C}_{2}}{{H}_{4}}\] are unsaturated hydrocarbons  and  both  decolourise bromine in \[CC{{l}_{4}}\], but only \[{{C}_{2}}{{H}_{2}}\] gives precipitate with ammonical \[AgN{{O}_{3}}\].


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