Question

The primary valency of metal ion to the coordination compound $K_2\left[Ni\right(CN{)}_4]$ is

• A. 4
• B. 2
• C. 6

Answer 1

The correct option is B 2

Primary valency are also called as oxidation state
$K_2\left[Ni\right(CN{)}_4]$, 2+x-4=0 $\Rightarrow$ x = +2