NEETChemistryd and f Block Elements
Select the set having incorrect statements given here. (i) Manganese exhibits +7 oxidation state (ii) Zinc forms coloured ions (iii) [ Co F 6 ] 3 - is diamagnetic (iv) Sc forms +4 oxidation state (v) Zn exhibits only +2 oxidation state
Options
- A(i), (ii) and (iii)
- B(ii), (iii) and (iv)
- C(i), (iii) and (iv)
- D(i), (iii) and (v)
Correct answer
B. (ii), (iii) and (iv)
Step-by-step solution
Outer electronic configuration of Mn is 3 d 5 4 s 2 which means it can show +7 oxidation state also (correct) Zinc does not form coloured ions as it has completely filled 3 d 10 4 s 2 configuration. In [ Co F 6 ] 3 - , C o 3 + is a d 6 system. Fluoride is a weak field ligand and hence it can not cause pairing of electrons. Sc can show a maximum of +3 oxidation state as it has an outer electronic configuration of 3 d 1 4 s 2 . Zn exhibits only +2 oxidation state as this oxidation state is the most stable one for it.