Question

Assertion (A) The coordination complexes $\left[ Ni ( CN )_{4}\right]^{2-}$ and $\left[ NiCl _{4}\right]^{2-}$ have not the same shape and similar magnetic behaviour.
Reason (R) Both are square planar in shape but $\left[ Ni ( CN )_{4}\right]^{2-}$ is diamagnetic but $\left[ Ni ( Cl )_{4}\right]^{2-}$ is paramagnetic.

• A. Both $A$ and $R$ are correct; $R$ is the correct explanation of $A$.
• B. Both $A$ and $R$ are correct; $R$ is not the correct explanation of $A$.
• C. $A$ is correct; $R$ is incorrect.
• D. $R$ is correct; $A$ is incorrect.

Answer 1

Answer: (C)

The coordination complexes $\left[ Ni ( CN )_{4}\right]^{2-}$ and $\left[ NiCl _{4}\right]^{2-}$ have not the same shape also differ in magnetic behaviour also.