Question

The valency of Cr in the complex $[Cr(H_2O)_4Cl_2)^+$ is

• A. 1
• B. 3
• C. 5
• D. 6

Answer 1

Answer: (B)

3

Answer 2

Let O.S. of Cr in $[Cr(H_2O)_4Cl_2)^+$ is $x$ O S. of $H_2O$ = 0, O.S. of Cl = -1 $\therefore \, x$ + 4 $\times$ 0 +2(- 1) = + 1 $x$ = +3