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NEET levelSingle correct optionDifficulty 1 of 3cb117

Which of the following molecules has a zero dipole moment?

A $H X_{2} O$
B $SO X_{2}$
C $NH X_{3}$
D $CO X_{2}$

Answer: D

CO X_{2}

is linear, so the two equal C=O bond dipoles cancel.

H X_{2} O

,

NH X_{3}

and

SO X_{2}

are bent or pyramidal and have net dipole moments.

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