Question

$\left[C o(C N)_{6}\right]^{3-}$ , a complex ion of cobalt (III), absorbs radiations in violet region of the visible light. Its aqueous solution, therefore, appears

• A. pink
• B. orange
• C. blue
• D. yellow

Answer 1

Answer: (D)

yellow

Answer 2

Yellow. The colour of the complex is complementary to that which is adsorbed.