Choose the Best Answer · Q9
Q.Incase of alkali metal halides, the ionic character increases in the order
a) MF < MCl < MBr < MI
b) MI < MBr < MCl < MF
c) MI < MBr < MF < MCl
d) none of these
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Start your 14-day free trial to unlock the full solution →Step 1. Ionic character in a halide depends on how little the cation distorts (polarises) the anion's electron cloud -- the less polarisable (smaller, less easily distorted) the halide ion, the more purely ionic the bond.
Step 2. Among F⁻, Cl⁻, Br⁻ and I⁻, polarisability rises with increasing ionic size: F⁻ is the smallest/least polarisable, I⁻ the largest/most polarisable (consistent with the text noting that even the small Li⁺ shows appreciable covalent character specifically with the large, easily …
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