The nature of the bond formed between two elements depends on the

Define electronegativity. How does it differ from electron gain enthalpy?

Which of the following is the correct order of electronegativity?

Given that the ionization potential and electron gain enthalpy of chlorine are $13 \ eV$ and $4 \ eV$ respectively. The electronegativity of chlorine on the Mulliken scale is approximately equal to: (in $eV$)

Arrange the following bonds in order of increasing ionic character,giving reasons: $N-H$,$F-H$,$C-H$,and $O-H$.

Consider the following.
Statement-$I$ : The order of electronegativity of $B, Al, In, Tl$ is $B > Tl > Al > In$.
Statement-$II$ : Boric acid is a weak protonic acid.
The correct answer is