Question

Which of the following statements is not correct?

• A. The complexes $ {{[NiC{{l}_{4}}]}^{2-}} $ and $ {{[Ni{{(CN)}_{4}}]}^{2-}} $ differ in the state of hybridization of nickel
• B. The complexes $ {{[NiC{{l}_{4}}]}^{2-}} $ and $ {{[Ni{{(CN)}_{4}}]}^{2-}} $ differ in the magnetic properties
• C. The complexes $ {{[NiC{{l}_{4}}]}^{2-}} $ and $ {{[Ni{{(CN)}_{4}}]}^{2-}} $ differ in geometry
• D. The complexes $ {{[NiC{{l}_{4}}]}^{2-}} $ and $ {{[Ni{{(CN)}_{4}}]}^{2-}} $ differ in primary valencies of nickel
• E. Nickel ion has the same secondary valency in the complexes $ {{[NiC{{l}_{4}}]}^{2-}} $ and $ {{[Ni{{(CN)}_{4}}]}^{2-}} $

Answer 1

Answer: (D)

The primary valencies of $ Ni, $ in the complexes $ {{[Ni(C{{l}_{4}})]}^{2-}} $ and $ {{[Ni(C{{N}_{4}})]}^{2-}} $ is same ie, $ (+\text{II}) $ . Primary valencies are those valencies in which a metal exhibits in the formation of its simple salt, these are non-directional. It is also referred as oxidation state of central metal atom.