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Question
When on heating, a solid becomes vapour without forming any liquid, it is said to have sublimed. Which of the following sublimes on heating?
When on heating, a solid becomes vapour without forming any liquid, it is said to have sublimed. Which of the following sublimes on heating?
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Solution
The correct option is B Iodine
The iodine atoms within one molecule are pulled closer to each other by a covalent bond. Between the molecules, their exist weak van der Waal forces. When Iodine crystals are heated, the van der Waal is easily overcome and the molecule breaks into the gas phase. The iodine atoms sublime and form a purple coloured dense vapour.
The iodine atoms within one molecule are pulled closer to each other by a covalent bond. Between the molecules, their exist weak van der Waal forces. When Iodine crystals are heated, the van der Waal is easily overcome and the molecule breaks into the gas phase. The iodine atoms sublime and form a purple coloured dense vapour.
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