JEE Main & Advanced Sample Paper JEE Main Sample Paper-19

  • question_answer The dipole moment of chlorobenzene is \[1.5D\]. The dipole moment of is

    A)  \[2.86\,D\]                    

    B)  \[2.25\,\,D\]

    C)  \[1.5\,\,D\]                   

    D)  \[0\,\,D\]

    Correct Answer: C

    Solution :

      Dipole moments of \[2Cl\] and \[5Cl\]are vectorically cancelled. It is duel \[l\] \[Cl\] and \[3\,\,Cl\] \[{{\mu }^{2}}\] \[=\mu _{1}^{2}+\mu _{2}^{2}+2{{\mu }_{1}}{{\mu }_{2}}\cos \theta \] \[={{(1.5)}^{2}}+{{(1.5)}^{2}}+2\times 1.5\times 1.5\times 1.5\cos \,120\]\[\therefore \] \[\mu =1.5D\]


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