RAJASTHAN ­ PET Rajasthan PET Solved Paper-2005

  • question_answer
    Which of the following reagent will differentiate in propene and propyne?

    A)  Alkaline \[KMn{{O}_{4}}\] 

    B)  Bromine water

    C)  \[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}}\]   

    D)  None of these

    Correct Answer: C

    Solution :

     \[\underset{propene}{\mathop{C{{H}_{3}}-CH=C{{H}_{2}}}}\,+{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}}\xrightarrow[{}]{{}}\] No reaction \[\underset{propyne}{\mathop{C{{H}_{3}}-C\equiv CH}}\,+{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}}\xrightarrow[{}]{{}}\] \[\underset{white\text{ }ppt}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  ||| \\  C-Ag \end{smallmatrix}}{\mathop{C-Ag}}\,+2NH_{4}^{+}}}\,\]


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