Question

In the complex, potassium pentacyanonitrosylvandate (0), the number of potassium atoms per molecule and the coordination number of central metal ion are respectively

• A. 5, 5
• B. 4, 6
• C. 5, 6
• D. 4, 4

Answer 1

Answer: (C)

Here in the complex, potassium pentacyanonitrosylvandate (0), the number of potassium atoms per molecule and the coordination number of central metal ion are 5, 6 respectively as oxidation number of V in this complex is '0' thus the charge on pentacyanonitrosylvandate is -5. Thus formula of the complex is $K_5\left[V(CN{)}_{5}NO\right]$ .