Find out the incorrect order of the dipole moment among the following pair of compound :

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${NH}_{3} > {NF}_{3}$

p-dichloro benzene > o-dichloro benzene

${CH}_{3} Cl > {CH}_{2} {Cl}_{2}$

${SiF}_{4} < {SF}_{4}$

answer is B.

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Detailed Solution

Due to a smaller bond angle than the m-isomer, o-dichlorobenzene has a greater dipole moment. Thus, P-dichlorobenzene, followed by m-dichlorobenzene, then o-dichlorobenzene, are in ascending order of dipole moment.

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