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In the case of alkali metals, the covale...

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

A

MCl gt MI gt MBr gt MF

B

MF gt MCl gt MBr gt MI

C

MF gt MCl gt MI gt MBr

D

MI gt MBr gt MCl gt MF

Text Solution

Verified by Experts

The correct Answer is:
D
According to Fajan's rule
Covalent character `prop 1/"size of cation "`
`prop` size of cation
In the given options , cation is same but anions are different .Among halogens the order of size is
F lt Cl lt Br lt I
`therefore` Order of covalent character is
MI gt MBr gt MCl gt MF
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