Question

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

• A. 1
• B. 3
• C. 5
• D. 6

Answer 1

The correct option is B

3

$\left[\stackrel{\bullet }{Cr}\right(H_{2}O{)}_{4}C{l}_2{]}^{+}$
x+0+2(-1)=+1; x-2=+1
x=+3 for Cr in complex.