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When ICl2 gas is bubbled through an aqueous KI solution containing CCl4 and the mixture is agitated, what is observed?

1. The top layer turns violet
2. The bottom layer turns violet
3. A uniform violet layer is produced
4. No violet color is observed

Correct answer: The bottom layer turns violet

Solution

The bottom layer turns violet when ICl₂ gas is bubbled through an aqueous KI solution containing CCl₄ because the reaction between ICl₂ and KI in the presence of CCl₄ leads to the formation of a violet-colored product that settles at the bottom.

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