Question

Mark the correct statements regarding the geometry of complex ions.
(i) The geometry of the complex ion depends upon the coordination number.
(ii) If the coordination number is 6, the complex is octahedral.
(iii) If the coordination number is 4, the geometry of the complex may be tetrahedral or square planar.

• A. (i), (ii) and (iii)
• B. (i) and (ii) only
• C. (i) and (iii) only
• D. (ii) and (iii) only

Answer 1

The correct option is A (i), (ii) and (iii)

In $\left[Fe\right(CN{)}_6^{3-}]$, the coordination number of $Fe$ is 6. The geometry of the complex is octahedral. In $\left[Ni\right(CO{)}_4]$, the coordination number of $Ni$ is 4. The geometry of the complex is tetrahedral. In $\left[Pt\right(N{H}_3{)}_{2}C{l}_2]$, the coordination number of $Pt$ is 4. The geometry of the complex is square planar.