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Solution


Q.

The purification method based on the following physical transformation is:                   [2025]

Solid(X)→HeatVapour(X)→CoolSolid(X)
1 Sublimation  
2 Crystallization  
3 Extraction  
4 Distillation  

Ans.

(1)

Some solid substances change from solid to vapour state without passing through liquid state. The purification technique based on the above principle is known as sublimation and is used to separate sublimable compounds from non-sublimable impurities.