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Naphthalene can be separated from sand :
(a) by sublimation (b) by distillation
(c) by crystallisation (d) by using water as solvent
Correct Answer: (a) by sublimation
Explanation: Naphthalene sublimes on heating, whereas sand does not. So, when the mixture is heated, solid naphthalene turns into vapours, which can be condensed. Sand remains in the container.
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