Question

(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.

Answer 1

Answer:

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.

Explanation: