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MHT CET202519 Apr 2025Morning ShiftChemistryChemical Bonding and Molecular StructureActual

Which of the following compounds has maximum covalent character?

Options

  1. ALiCl
  2. BLiI
  3. CNaCl
  4. DNaI

Correct answer

B. LiI

Step-by-step solution

Fajan's rules determine covalent character based on cation size, anion size, and ion charge. Smaller cations and larger anions increase covalent character due to greater polarizing power and polarizability. The Li ^+ cation is smaller than Na ^+ since lithium is in period 2 while sodium is in period 3. Compounds with Li ^+ therefore exhibit greater covalent character. Between chloride and iodide anions, I ^- is larger than Cl ^- as iodine is in period 5 while chlorine is in period 3. The larger iodide anion contrib

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