NTA Abhyas JEE Main2020ChemistryCoordination CompoundsPractice
Among the following complexes (K - P), which of the following are diamagnetic? K 3 [ Fe CN ) 6 K , [ Co N H 3 ) 6 C l 3 L , N a 3 [ Co oxalate ) 3 M , [ Ni H 2 O ) 6 C l 2 N , K 2 [ Pt CN ) 4 O and [ Zn H 2 O ) 6 ( N O 3 ) 2 P
Options
- AK, M, O, P
- BK, L, M, N
- CL, M, N, O
- DL, M, O, P
Correct answer
D. L, M, O, P
Step-by-step solution
Following compounds are diamagnetic as in them metal ion has no unpaired electron. L: [ Co N H 3 ) 6 C l 3 M: N a 3 [ Co Ox ) 3 O: K 2 [ Pt CN ) 4 P: [ Zn H 2 O ) 6 ( N O 3 ) 2 In L, M, O inner d-electrons get paired while in P Zn has already 3 d 10 configuration. In K and N there are 1 and 2 unpaired electrons respectively so they are paramagnetic.