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AP EAMCET · Chemistry · Chemical Bonding and Molecular Structure

Which is the most covalent?

  1. A \(\mathrm{AlCl}_3\)
  2. B \(\mathrm{AlI}_3\)
  3. C \(\mathrm{MgI}_2\)
  4. D \(\mathrm{NaI}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(\mathrm{AlI}_3\)

Step-by-step Solution

Detailed explanation

\(\mathrm{AlI}_3\) is the most covalent compound. According to Fajan's rule, covalent character \(\propto\) small cation or large anion or positive charge Since, lesser the electronegativity difference more covalent is aluminium halide. Hence, the most covalent halide is…