The coordination number of central metal atom in a complex is determined by

1. the number of ligands around a metal ion bonded by sigma bonds
2. the number of only anionic ligands bonded to the metal ion
3. the number of ligands around a metal ion bonded by sigma and pi- bonds both
4. the number of ligands around a metal ion bonded by pi-bonds

Solution

Asked in: JEE Main 2004

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