Sublimation is used to purify:
Correct answer: C. Benzoic acid
- A. Ammonium sulphate
- B. Sodium chloride
- C. Benzoic acid
- D. Lead carbonate
Explanation
A is incorrect as ammonium sulphate is purified through centrifuging.B is incorrect as sodium chloride is purified by crystallization.C is correct as benzoic acid is purified through sublimation.D is incorrect as lead carbonate is purified through sulfation, desulfurization leaching, distillation and carbonization.
Last updated
About Sublimation and Distillation
Sublimation separates a sublimable solid from non-sublimable impurities by direct conversion between solid and vapour, followed by deposition. Distillation separates liquids through differences in boiling points, including simple, fractional, steam and vacuum distillation, and the choice depends on volatility, miscibility and thermal stability.
Practise Experimental Techniques in Chemistry
79 free Experimental Techniques in Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
The separation of components of liquid on the basis of their boiling points is called as?
What are the products of destructive distillation of coal?
Rectified spirit is converted into the absolute alcohol by _.
In a vacuum distillation the boiling point of glycerin is reduced to _?
The acid which can be purified by the sublimation is: