AIIMS 2019 Chemistry Properties of Compounds MCQ Question
Yellow color of chlorine water fades because of:
Form &
Chlorine gas escapes
Correct Answer
Detailed Explanation
The pale yellow color of bismuth carbonate (Bi₂(CO₃)₃) is attributed to the presence of Bi³⁺ ions, which exhibit color due to their electronic transitions. In contrast, the carbonates of Hg₂²⁺, Sr²⁺, and Li⁺ are colorless because these metal ions do not have unpaired d-electrons, preventing any electronic transitions that would result in color. This distinction highlights the role of electronic structure in determining the color of metal carbonates.
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