Free Sublimation and Distillation MCQs with Answers
8 Sublimation and Distillation MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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.
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8 questions
- A. Destructive distillation
- B. Fractional distillation
- C. Vacuum distillation
- D. Partial distillation
Explanation: Destructive distillation is a process that involves heating organic material in the absence of air or oxygen to break it down into simpler…
Correct answer: Fractional distillation- A. Coal tar
- B. Coke
- C. Coal gas
- D. All of above
Explanation: Destructive distillation is a chemical process in which decomposition is achieved by heating to a high temperature; the term generally…
Correct answer: All of above- A. Crystallization
- B. Distillation
- C. Re-distillation
- D. Fractional distillation
Explanation: c) Re-distillation: Re-distillation is essentially the same as distillation.
Correct answer: Re-distillation- A. 290°C
- B. 110°C
- C. 156°C
- D. 210°C
Explanation: Correct option is D. Under vacuum, the boiling temperature of glycerin decreases to 210°C at 50 torr.
Correct answer: 210°C- A. Acetic Acid
- B. Oxalic Acid
- C. Benzoic Acid
- D. Citric Acid
Explanation: Explanation:Benzoic acid has a high melting point (122°C) and a low vapor pressure, which allows it to sublime at room temperature and…
Correct answer: 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 answer: Benzoic acid- A. Simple diffusion
- B. Fractional distillation
- C. Chromatography
- D. Graham's law of diffusion
Explanation: Fractional distillation is the special technique which is used for separation of mixture of two gases
Correct answer: Fractional distillation- A. NaHCO3
- B. CaCO3.H2O
- C. CaCl2 anhydrous
- D. Na2SO4.H2O
Explanation: CaCl2 (anhydrous calcium chloride): Calcium chloride is a widely used drying agent due to its strong hygroscopic properties.
Correct answer: CaCl2 anhydrousSublimation and Distillation MCQs: common questions
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There are 8 Sublimation and Distillation MCQs in the Chemistry bank, shown 20 to a page with the correct answer and an explanation on each.
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