Question

The pairs of ions which exhibit same colour in aquated state are: I. \[ Fe^{2+}, Ni^{2+} \] II. \[ V^{2+}, Cr^{2+} \] III. \[ Cr^{2+}, Cu^{2+} \]

• A. I, II only
• B. II, III only
• C. I, II, III
• D. I, III only

Hint:

Important colours: \[ Cu^{2+} \rightarrow \text{Blue} \] \[ Cr^{2+} \rightarrow \text{Blue} \] \[ Ni^{2+} \rightarrow \text{Green} \] \[ Fe^{2+} \rightarrow \text{Pale Green} \]

Answer 1

The Correct Option is D