BHU PMT BHU PMT (Mains) Solved Paper-2005

  • question_answer
    Molecule having least dipole moment is:

    A) \[{{(C{{H}_{3}})}_{2}}C{{H}_{2}}\]

    B)  \[C{{H}_{2}}==CHC\equiv \equiv CH\]

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

    D)  \[{{H}_{3}}C.C\equiv \equiv CC{{H}_{3}}\]

    Correct Answer: D

    Solution :

    \[{{H}_{3}}C.C\equiv \equiv C.C{{H}_{3}}\]has zero dipole moment due to symmetrical structure with linear geometry. Hence, its dipole moment is the least among these.


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