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Answer 1

Answer:

• Sublimation

• to separate such mixtures that contain a sublimable volatile component from a non-sublimable impurity (salt in this case), the sublimation process is used .

• Some examples of solids which sublime are ammonium chloride, camphor, naphthalene and anthracene.

• ▪Take a thin strip of filter paper.

▪Draw a line on it using a pencil, approximately 3 cm above the lower edge

▪Put a small drop of ink (water soluble, that is, from a sketch pen or fountain pen) at the centre of the line. Let it dry.

▪Lower the filter paper into a jar/glass/beaker/test tube containing water so that the drop of ink on the paper is just above the water level, as shown in Fig.4 (b) and leave it undisturbed.

▪Watch carefully, as the water rises up on the filter paper. Record your observations.

Explanation:

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