(B)Draw a neat and labelled diagram of the setup of apparatus needed to
separate two component P and Q in which P component changes directly
from solid to gaseous state.
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Ammonium chloride changes directly from solid gaseous on heating . So to separate mixtures containing a sublimable volatile component from a non-sublimable impurity i.e., sodium chloride, the sublimation process is used.
• Place the china dish over a wire gauze placed over a tripod stand.
• Cover the china dish with an inverted glass funnel and plug in a little cotton at the opening stem.
• On heating the mixture, white fumes evolve.
• Stop heating when the fumes stop rising and allow the funnel to cool.
• On cooling, remove the funnel and transfer the solid ammonium chloride sticking on the walls of funnel to a watch glass.
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