RAJASTHAN PMT Rajasthan - PMT Solved Paper-2002

  • question_answer
    A compound \[{{C}_{5}}{{H}_{8}}\] which give white ppt. with ammonical \[AgN{{O}_{3}}\]. A give \[{{(C{{H}_{3}})}_{2}}CHCOOH\]with hot alkaline \[KMn{{O}_{4}}\]then compound is:

    A)  \[C{{H}_{3}}C{{H}_{2}}-C{{H}_{2}}-CH=C{{H}_{2}}\]

    B)  \[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH\]

    C)  \[{{(C{{H}_{3}})}_{2}}CH-C\equiv CH\]

    D)  \[C{{H}_{2}}=CH-C{{H}_{2}}-CH=C{{H}_{2}}\]

    Correct Answer: C

    Solution :

    Compound is \[{{(C{{H}_{3}})}_{2}}CH-C\equiv CH\] \[{{(C{{H}_{3}})}_{2}}CH-C\equiv CH-AgN{{O}_{3}}+N{{H}_{4}}OH\xrightarrow{{}}\] \[\underset{(White\,ppt)}{\mathop{{{(C{{H}_{3}})}_{2}}CH}}\,-C\equiv CH-AgN{{O}_{3}}+N{{H}_{4}}N{{O}_{3}}+{{H}_{2}}O\] \[{{(C{{H}_{3}})}_{2}}CH-C\equiv CH+[O]\xrightarrow[KMn{{O}_{4}}/KOH]{Hot}\]                                                 \[{{(C{{H}_{3}})}_{2}}CH-COOH\]


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