Answer:
Place
the mixture on a paper or petridish, move a bar magnet many times over the
mixture. Iron filings get attached to the magnet and get separated later on by
scrapping. Then remaining mixture is transferred to china dish and subjected to
sublimation. Ammonium chloride is separated by this step.
Now a mixture of sodium chloride and sand is left, that is dissolved in
water. Salt dissolves and sand is separated by filtration. Now sodium chloride
is separated from water by crystallisation.
(3)
We can summarise all the processes involved here.
(i) Magnetic separation (ii) Sublimation
(iii) Filtration after dissolution
(iv) Crystallisation (2)
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