# Which of the following molecule has the non-zero dipole moment

$\begin{array}{1 1}(a)\;CHCl_3&(b)\; CH_4\\(c)\;CCl_4&(d)\;CO_2\end{array}$

$CHCl_3$ dipolemoment is 1.04
$CH_4$ dipolemoment is 0
$CCl_4$ dipolemoment is 0
$CO_2$ dipolemoment is 0
Hence (a) is the correct answer.