Question

The valency of Cr in the complex $[Cr(H_{2}O{)}_{4}C{l}_2{)}^{+}$ is

• A. 1
• B. 3
• C. 5
• D. 6

Answer 1

Answer: (B)

Let O.S. of Cr in $[Cr(H_{2}O{)}_{4}C{l}_2{)}^{+}$ is $x$
O S. of $H_{2}O$ = 0, O.S. of Cl = -1
$\therefore x$ + 4 $\times$ 0 +2(- 1) = + 1
$x$ = +3