JEE Main & Advanced Chemistry GOC Question Bank Structural and stereo isomerism

  • question_answer Which of the following is most likely to show optical isomerism [UPSEAT 2004]

    A) \[HC\equiv C-\underset{Cl\,}{\overset{H\,}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,-}}}\,C\equiv CH\]

    B) \[HC\equiv C-\underset{Cl}{\overset{H}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-C{{H}_{3}}\]

    C) \[HC\equiv C-\underset{Cl}{\overset{H}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-H\]

    D) \[HC\equiv C-\overset{Cl}{\mathop{\overset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}\]

    Correct Answer: B

    Solution :

    \[HC\equiv C-\underset{Cl\ }{\mathop{\overset{H}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}\,-}}\,C{{H}_{3}}\] shows optical isomerism because of molecule is unsymmetrical. That is called chiral.

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