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Effect of Heat on Iodine Crystals

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Effect of Heat on Iodine Crystals

Question

State and explain the observations made when iodine crystals is heated in a boiling tube?

Answer

- Black crystals changes directly into purple vapour
- The iodine crystals (sublimes) changed directly into a purple vapour without passing
- liquid state and changed back to black iodine crystals on the upper cooler parts of boiling tube


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