Question

The coordination compound is a complex substance which contains a central metal atom or ion surrounded by oppositely charged ions or neutral molecules. These compounds exhibit structural as well as stereoisomerism. Hybridisation theory explains the geometry of the complex. Crystal field theory explains the colour of complexes and magnetic properties.
Identify the correct statement

• A. $\left[ Ni ( CN )_{4}\right]^{2-}$ is tetrahedral and paramagnetic
• B. $\left[ NiCl _{4}\right]^{2-}$ is square planar and paramagnetic
• C. $\left[ Ni ( CO )_{4}\right]$ is square planar and paramagnetic
• D. $\left[ Cu ( CN )_{4}\right]^{3-}$ is tetrahedral and diamagnetic

Answer 1

Answer: (D)

Correct answer is (d) $\left[ Cu ( CN )_{4}\right]^{3-}$ is tetrahedral and diamagnetic