alleryCharcoal shaken with a dye solution leaves the filtrate:
ADarker still
BBright blue
CDeep yellow
DColourless
Answer & Solution
Correct answer: D. Colourless
1. The dye molecules gather on the charcoal surface.
2. They are removed from the solution as a result.
3. So the filtrate turns colourless.
_Source: syllabus Chemistry Part I, Chapter 5, Surface Chemistry._
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