Which of the following molecules has the most polar covalent bond?

Although both $CO_2$ and $H_2O$ are triatomic molecules,the shape of $H_2O$ molecule is bent while that of $CO_2$ is linear. Explain this on the basis of dipole moment.

If compound $MX_4$ has $\mu = 0$,then the most probable geometry will be:

Identify the correct order of average molecular dipole moment for the following species: $PCl_3F_2$, $N_2O_{4(g)}$, and $N_2O_{4(s)}$.

Arrange the following compounds in increasing order of dipole moment:
$CH_3CH_2CH_3$,$CH_3CH_2NH_2$,$CH_3CH_2OH$

$A$ neutral molecule $XF_3$ has a zero dipole moment. The element $X$ is most likely