The relatively strong forces between molecules containing $F-H,O-H,$ and $N-H$ bonds are attributed to:

a$.$ dipole$-$dipole force

b$.$ hydrogen bonding

c$.$ ionic bonding

d$.$ London force

The name for the weak attraction between molecules, believed to be caused by electrons in one molecule being attracted by the positive nuclei in nearby molecules is:

a$.$ dipole$-$dipole force

b$.$ hydrogen bonding

c$.$ London force

d$.$ network bonding

According to the Lewis model, the number of bonding electrons $($i$.$e$.$ bond capacity$)$ in a nitrogen atom is:

a$.1$

b$.3$

c$.5$

d$.7$

Which of the following elements has the tightest hold on its electrons?

a$.Si$

b$.Ca$

c$.Cl$

d$.Ag$