BHU PMT BHU PMT (Mains) Solved Paper-2006

  • question_answer
    Which molecule has dipole moment zero?

    A)  \[{{H}_{2}}O\]                 

    B)  

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

    D)  \[C{{O}_{2}}\]

    Correct Answer: D

    Solution :

                     The dipole moment of\[C{{O}_{2}}\]is zero due to its linear structure. \[O\overset{\leftarrow }{\mathop{=}}\,C\overset{\to }{\mathop{=}}\,O\] The individual bond moments of two bonds are equal in magnitude but in opposite direction hence, the two bond moments cancel to each other.


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