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Question
Why does only iodine appear as violet vapours on heating?
Options
Both iodine and sand sublime
Sand melts but iodine forms vapour
Iodine melts then evaporates
Iodine sublimates but sand does not
MCQ
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Solution
Iodine sublimates, but sand does not
Explanation:
Iodine sublimates into vapour, while sand does not change state on heating.
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