JEE Main & Advanced AIEEE Solved Paper-2009

  • question_answer
    Buna-N synthetic rubber is a copolymer of:     AIEEE  Solved  Paper-2009

    A) \[{{H}_{2}}C=CH-\overset{\begin{smallmatrix}  Cl \\  | \end{smallmatrix}}{\mathop{C}}\,=C{{H}_{2}}\] and \[{{H}_{2}}C=CHCH=C{{H}_{2}}\]

    B) \[{{H}_{2}}C=CHCH=C{{H}_{2}}\]and \[{{H}_{5}}{{C}_{6}}CH=C{{H}_{2}}\]

    C) \[{{H}_{2}}C=CHCN\] and \[{{H}_{2}}C=CHCH=C{{H}_{2}}\]

    D) \[{{H}_{2}}C=CHCN\] and\[{{H}_{2}}C=CH\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,=C{{H}_{2}}\]

    Correct Answer: C

    Solution :

    \[n\text{ }C{{H}_{2}}=CHCH=CH+HCH=CHCN\] \[\xrightarrow[peroxide]{polymerisation}\left[ -C{{H}_{2}}CH=CH-C{{H}_{2}}-C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  CN \end{smallmatrix}}{\mathop{CH}}\,- \right]\]                                                 Buna - N Rubber


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