What happens when a mixture of sand and iodine is heated in a test tube
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iodine will evaporate from the test tube
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- It is case of sublimation
- when u heat mixture of iodine and sand then the vander walls force of iodine overcome due to heating and molecule breaks into gas phase
- Generally here iodine crystal sublime and form a pure purple colored dense vapour
- Means in short dark purple black solid iodine is formed
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