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Iodine could be separated from the mixture of iodine and Calcium chloride by

Chemistry
WAEC 2025

Iodine could be separated from the mixture of iodine and Calcium chloride by

  • A. Evaporation
  • B. Sublimation
  • C. fractional distillation
  • D. fractional crystallization
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Correct Answer: Option B
Explanation

Iodine can be separated from calcium chloride using sublimation because of the distinct physical properties of the two substances: 

1. Iodine is a sublimable solid, meaning it transitions directly from a solid state to a gaseous state upon heating without passing through a liquid phase.

2. Calcium chloride is a non-sublimable ionic salt with a very high melting point, so it remains in the solid state while the iodine vapourizes.


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