Question

All the following complexes show decrease in their weights when placed in a magnetic balance then the group of complexes having tetrahedral geometry is :

I Ni(CO)4 II K[AgF4] III Na2 [Zn(CN)4]

IV K2 [PtCl4] V [RhCl(PPh3)3]

• A. II , III , V
• B. I , II , III
• C. I , III , IV
• D. None of these

Answer 1

Answer: (D)

None of these

Answer 2

(i) It is tetrahedral (sp3) because there is no (n–1)d orbital vacant for dsp2 hybridisation.

(ii) Ag with +3 oxidation state and 4d8 configuration has square planar geometry.

(iii) It is tetrahedral (sp3) because there is no (n–1)d orbital vacant for dsp2 hybridisation.

(iv) Pt with +2 oxidation state and 5d8 configuration has square planar geometry.

(v) Rh with +1 oxidation state and 4d8 configuration has square planar geometry.

When we place these complexes in a magnetic balance, then there is decrease in their weights. This indicates that the complexes are dimagnetic.