Q. The correct set of ions (aqueous solution) with same colour from the following is:
A) Sc³⁺, Ti³⁺, Cr²⁺
B) V²⁺, Cr³⁺, Mn³⁺
C) Ti⁴⁺, V⁴⁺, Mn²⁺
D) Zn²⁺, V³⁺, Fe³⁺
Explanation
[Solution by Dr. Abubacker] In aqueous solution V²⁺, Cr³⁺ and Mn³⁺ are all violet. In the other sets the colours differ (for example Sc³⁺, Ti⁴⁺ and Zn²⁺ are colourless while Ti³⁺ is purple and Cr²⁺ is blue). Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.