1.

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

Answer»

`MFgtMCIgtMBrgtMI`
`MFgtMCIgtMIgtMB`
`MIgtMBrgtMCIgtMF`
`MCIgtMIgtMBrgtMF`

SOLUTION :As the size of HALIDE ion decreases `I^(-)gtBr^(-)GTCI^(-)GTF^(-)` TENDENCY to get polarised by cation`M^(+)` decreases hence covalent character decreases


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