The Pauling electronegativity values of elements are important in predicting which of the following?

The electronegativity values of $F, Cl, Br,$ and $I$ are $4.0, 3.0, 2.8,$ and $2.5$ respectively. Which hydrogen halide has the highest percentage of ionic character?

If $P$,$Q$,$R$ and $S$ are elements of the $3^{rd}$ period of the $p-$block,among these one element is a metal and the rest are non-metals,and their order of electronegativity is given as: $P < Q < R < S$. The chloride compound of which element is hypovalent?

The property of attracting electrons by the halogen atom in a molecule is called

The increasing order of electronegativity is:

Assertion : Electron affinity refers to an isolated atom's attraction for an additional electron while electronegativity is the ability of an atom of an element to attract electrons towards itself in a shared pair of electrons.
Reason : Electron affinity is a relative number and electronegativity is experimentally measurable.