The melting point of CaI_(2) is much lower (575^(@)C) than that of CaF_(2) (1392^(@)C)-explain with reason.

The melting point of CaI_(2) is much lower (575^(@)C) than that of CaF

1.	The melting point of CaI_(2) is much lower (575^(@)C) than that of CaF_(2) (1392^(@)C)-explain with reason.
Answer» Solution :According to Fajan's rule, tendencyy of a large sized anion to be polarised is GREATER than that of a small sized anion. So a COMPOUND CONTAINING a large sized anion exhibits more covalent character than that with a small sized anion. Hence, `CaI_(2)` containing larger `I^(-)` ion possesses higher covalent character and melts at a relatively low TEMPERATURE. on the other hand, `CaF_(2)` containing smaller `F^(-)` ion possesses much lowerr covalent character and melts at very high temperature.