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

(a) MCl > MI > MBr > MF

(b) MF > MCl >  MBr > M

(c)MF > MCl > MI > MBr

(d) MI > MBr > MCl > MF

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#15 | Dipole Moment

Concept Questions :-

(d) According to Fajan's rule,

Covalent character 1size of cationsize of anion

In the given options, cation is same but anions are different. Among halogens the order of size is

                      F < Cl < Br < I

Order of covalent character is

                   MI > MBr > MCl > MF

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