Which of the following compounds will show the highest dipole moment?

Give the correct order of initials $T$ or $F$ for the following statements. Use $T$ if the statement is true and $F$ if it is false.
$I. \, (CH_3)_2P(CF_3)_3$ is non-polar and $(CH_3)_3P(CF_3)_2$ is a polar molecule.
$II. \, CH_3 \widehat{P} CH_3$ bond angles are equal in the $(CH_3)_3P(CF_3)_2$ molecule.
$III. \, PF_3$ will be more soluble in a polar solvent than $SiF_4$.

The dipole moments of $CCl_{4}$,$CHCl_{3}$ and $CH_{4}$ are in the order:

Which of the following compounds does not possess a dipole moment?

Which of the following is a non-polar solvent?

$CO$ is practically non-polar since