Answer:
Crystallization method can be
used to purify those mixtures which
(i) contain insoluble and/or soluble
impurities. (1)
(ii) are crystalline in
nature. (1)
(iii) either decompose or get
charred (e.g., sugar) on heating to dryness, i.e., which cannot be separated by
evaporation. (1)
(iv) cannot be separated by
filtration as some impurities are soluble. (1)
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