Question

The valency of Cr in the complex$\left[ \mathrm { Cr } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 4 } \mathrm { Cl } _ { 2 } \right] ^ { + }$.

• A. 1
• B. 3
• C. 5
• D. 6

Answer 1

Answer: (B)

3

Answer 2

$x + 0 + 2 ( - 1 ) = + 1$; $x - 2 = + 1$

$x = + 3$ for Cr in complex.