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Which of the following is most likely to have the greatest covalent character (Fajans' rules)?
ALiCl
BNaCl
CKCl
DCsCl
Answer & Solution
Correct answer: A. LiCl
Fajans' rules: **smaller cation + larger anion + higher cation charge → more covalent character**. Among Group 1 chlorides, Li⁺ is the smallest cation, so **LiCl** has the most covalent character.
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