NTA Abhyas NEET2020ChemistryChemical Bonding and Molecular StructurePractice
What is correct order of decreasing ionic character? P b C l 2 ( I ) ; P b F 2 ( I I ) ; P b I 2 ( I I I ) ; P b B r 2 ( I V )
Options
- AIII > IV > I > II
- BI > II > III > IV
- CIII > I > IV > II
- DII > I > IV > III
Correct answer
D. II > I > IV > III
Step-by-step solution
According to Fajan's rule, as the size of anion increases, covalent character also increases and ionic nature decreases so the correct order is P b F 2 ( I I ) > P b C l 2 ( I ) > P b B r 2 ( I V ) > P b I 2 ( I I I )