Choose correct option:-
1. Zinc forms colored ions
2. [CoF6]3− is paramagnetic
3.Sc forms +4 oxidation state
4. Zinc is not a transition element
Option 1- Zn2+ has no unpaired electrons, it is diamagnetic and thus, colorless.
Option 2- In co-ordination compound [CoF6]3−, Co3+ has 4 unpaired electrons, thus, it is paramagnetic.
Option 3- Maximum oxidation state shown by Sc is +3.
Option 4- Zinc atom has completely filled d orbitals (3d10) in its ground state as well as in its oxidised state, hence it is not regarded as a transition element.