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AIIMS AIIMS Solved Paper-2014

  • question_answer
    Assertion 2-butyne     on     controlled hydrogenation with \[\text{Pd}/\text{CaC}{{\text{O}}_{\text{3}}}\]in presence of \[PbO\] gives cis- 2-butene. Reason Hydrogenation occur at the surfaces of metal containing adsorbed hydrogen.

    A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion

    B) Both Assertion and Reason are true and Reason is not the correct explanation of Assertion

    C) Assertion is true but Reason is false

    D) Both Assertion and Reason are false

    Correct Answer: B

    Solution :

                    Poisoning by \[\text{PbO}\]prevent further hydrogenation of alkene to alkane.


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