Which of the following has zero value of dipole moment?

X e F_{2}

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C H C I_{3}

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C O_{2}

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None

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Solution

The correct options are
A $X e F_{2}$
C $C O_{2}$
Due to linear and symmetrical structure, both these molecules have zero dipole moment.
$O = C = O$ and $F - X e - F$ but $C H C l_{3}$ have tetrahedral structure. So its dipole moment is not zero.

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