Q.

Ammonium chloride and iron are separated by ___________.

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a

liquefaction 

b

sublimation

c

distillation

d

chromatography

answer is B.

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Detailed Solution

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  • If a mixture of two solids contains a solid which can sublime on heating then sublimation is used. The mixture is heated and the solid that sublimes is collected in an inverted flask and is scratched out. 
  • In the mixture of ammonium chloride and iron, ammonium chloride is sublime. It sublimes after heating leaving behind iron.
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