JEE Main & Advanced Chemistry Chemical Bonding and Molecular Structure Question Bank Critical Thinking

  • question_answer The correct order of dipole moment is   [Roorkee 1999]

    A)                 \[C{{H}_{4}}<N{{F}_{3}}<N{{H}_{3}}<{{H}_{2}}O\]

    B)                 \[N{{F}_{3}}<C{{H}_{4}}<N{{H}_{3}}<{{H}_{2}}O\]

    C)                 \[N{{H}_{3}}<N{{F}_{3}}<C{{H}_{4}}<{{H}_{2}}O\]

    D)                 \[{{H}_{2}}O<N{{H}_{3}}<N{{F}_{3}}<C{{H}_{4}}\]

    Correct Answer: A

    Solution :

                    The dipole moment of \[C{{H}_{4}}=0D,\] \[N{{F}_{3}}=0.2D,\,\,N{{H}_{3}}=1.47D\] and \[{{H}_{2}}O=1.85D\]. Therefore the correct order of the dipole moment is \[C{{H}_{4}}<N{{F}_{3}}<N{{H}_{3}}<{{H}_{2}}O\].

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