1) The colour of light absorbed by an aqueous solution of $CuSO_{4}$ is A) orange-red B) blue-green C) yellow D) violet Answer: Option AExplanation:The aqueous solution of $CuSO_{4}$consist of the complex$ [Cu(H_{2}O)_{4}]^{2+}$ ion which adsorbs in the orange-red region and impart deep blue colouration to the solution.
