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(D) molecule exhibits a dipole moment if it is polar and has a non-zero net dipole moment. $1, 4-$dichlorobenzene is a symmetric molecule where the di

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Both $(b)$ and $(c)$

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(D) molecule exhibits a dipole moment if it is polar and has a non-zero net dipole moment. $1, 4-$dichlorobenzene is a symmetric molecule where the dipole moments of the two $C-Cl$ bonds cancel each other out,resulting in a net dipole moment of $0$. $cis-1, 2-$dichloroethene is polar because the two $Cl$ atoms are on the same side,leading to a non-zero net dipole moment. $trans-1, 2-$dichloro$-2-$pentene is an unsymmetrical molecule because the groups attached to the double-bonded carbons are different (one side has $H$ and $Cl$,the other has $CH_3$ and $Cl$). Due to this lack of symmetry,the dipole moments do not cancel out,resulting in a non-zero dipole moment. Therefore,both $(b)$ and $(c)$ exhibit a dipole moment.

List-$I$ (Molecules)	List-$II$ (Dipole moment)
$A$. $HBr$	$I$. $1.04$
$B$. $H_2S$	$II$. $0$
$C$. $NH_3$	$III$. $0.79$
$D$. $CHCl_3$	$IV$. $0.95$
	$V$. $1.47$

Which of the following molecules exhibits a dipole moment?

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List-$I$ (Molecules) List-$II$ (Dipole moment)
$A$. $HBr$ $I$. $1.04$
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