Question

The colour of light absorbed by an aqueous solution of $CuS{O}_4$ is:

• A. Orange-red
• B. Blue-green
• C. Yellow
• D. Violet

Answer 1

The correct option is A Orange-red

The aqueous solution of $CuS{O}_4$ consist of the complex $\left[\right(Cu(H_{2}O{)}_4{]}^{2+}$ ion which absorbs in the orange-red region and impart deep blue colouration to the solution.