Question

Match List - I with List - II:

List - I:

(A) \([ \text{MnBr}_4]^{2-}\) 
(B) \([ \text{FeF}_6]^{3-}\) 
(C) \([ \text{Co(C}_2\text{O}_4)_3]^{3-}\) 
(D) \([ \text{Ni(CO)}_4]\) 

List - II: 

(I) d²sp³ diamagnetic 
(II) sp²d² paramagnetic 
(III) sp³ diamagnetic 
(IV) sp³ paramagnetic

• A. (A)-(III),(B)-(II),(C)-(I),(D)-(IV)
• B. (A)-(IV),(B)-(I),(C)-(II),(D)-(III)
• C. (A)-(I),(B)-(II),(C)-(III),(D)-(IV)
• D. (A)-(IV),(B)-(I),(C)-(III),(D)-(II)

Hint:

To determine the hybridization and magnetic properties, consider the oxidation state and geometry of the metal center in the complex.

Answer 1

The Correct Option is A

The electronic configuration of each complex is analyzed to determine the hybridization and magnetic properties: 
- (A) \([ \text{MnBr}_4]^{2-}\) is sp³ diamagnetic. 
- (B) \([ \text{FeF}_6]^{3-}\) is sp²d² paramagnetic. 
- (C) \([ \text{Co(C}_2\text{O}_4)_3]^{3-}\) is d²sp³ diamagnetic. 
- (D) \([ \text{Ni(CO)}_4]\) is sp³ paramagnetic. 
Thus, the correct matching is (A)-(III),(B)-(II),(C)-(I),(D)-(IV).