Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Fajan's Rules explain the covalent character in ionic compounds. Increased covalent character leads to lower solubility in water and lower melting points.

A. Ag₂S is less soluble than Ag₂O because S²⁻ is larger and more polarizable than O²⁻, increasing covalent character.

B. PbI₂ is less soluble than PbCl₂ because I⁻ is larger and more polarizable than Cl⁻, increasing covalent character.

D. AlCl₃ has a lower melting point than NaCl because Al³⁺ is smaller and has a higher charge than Na⁺, leading to greater polarization and more covalent character.