AIIMS 2018 Chemistry Color of Compounds MCQ Question

Violet color appears in glass when Cr³⁺ ions are added due to their ability to absorb specific wavelengths of light, particularly in the visible spectrum, resulting in the transmission of violet light. In contrast, Mn⁴⁺ typically imparts a brown color due to its absorption characteristics, I₂ does not contribute to color in glass, and K⁺ ions are colorless and do not affect the coloration of glass. Understanding the role of transition metal ions in color development is crucial, as their d-orbitals allow for electronic transitions that influence light absorption and color perception.