Question

In the case of alkali metals, the covalent character decreases in the order

(a) MF > MCl > MBr > MI

(b) MF > MCl > MI > MBr

(c) MI > MBr > MCl > MF

(d) MCl > MI > MBr > MF

Answer 1

The correct option is: (c) MI > MBr > MCl > MF

Explanation:

Alkali metals are highly electropositive and halogens are electronegative. Thus for the halides of a given alkali metal, the covalent character decreases with increase in electronegativity of halogens.

.^. . Order of covalent character of halides is

MI > MBr > MCl > MF.