If the $HCl$ molecule were completely polar,the expected dipole moment would be $6.12 \ D$,but the experimental value of the dipole moment is $1.03 \ D$. What is the percentage of ionic character (in $\%$)?

Which of the following molecules has the highest dipole moment?

Which of the following molecules have non-zero dipole moments?
$I$. Gauche conformation of $1, 2$-dibromoethane
$II$. Anti conformation of $1, 2$-dibromoethane
$III$. Trans-$1, 4$-dibromocyclohexane
$IV$. Cis-$1, 4$-dibromocyclohexane
$V$. Tetrabromomethane
$VI$. $1, 1$-dibromocyclohexane

Positive dipole moment is present in

Which of the following compounds has the least dipole moment?

The percentage ionic character of the $HBr$ molecule, if the dipole moment is $0.63 \ D$ and $HBr$ bond length is $187.5 \ pm$, is: