Question

According to Fajan's rule, ionic character increases for:

• A. Large cation and small anion
• B. Small cation and small charge on cation
• C. Small cation and large charge on cation
• D. Large cation and no charge on cation

Answer 1

The correct option is A Large cation and small anion

More the size of cation leads to lesser polarizability of it. Lesser the polarizability more is the ionic character.
Smaller size of anion leads to lesser polarisation. Lesser the polarisation more is the ionic character.