JEE Main 2006 Chemistry question
How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a ion?
Answer: (3)
Solution
EDTA⁴⁻ is a hexadentate ligand (2 N + 4 O donors), so one EDTA occupies all six octahedral positions around , option (3).