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Chemistry Fsc Part 1 Chapter 2 Online Test MCQs With Answers

Question # 1

Repeated extraction using small portions of solvent are more.

Choose an answer

Accurate

efficient

Slow

Rapid

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Question # 2

One of the following substances does not undergo sublimation

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KMnO₄

Naphthalene

NH₄CI

Iodine

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Question # 3

The crystallization of a solid substance is done from a hot saturated solution. The solution is

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Evaporated rapidly

Cooled very slowly to get good crystals

Cooled rapidly to get excellent crystals

Mixed with another miscible solvent

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Question # 4

Chromatography in which the stationary phase is a solid is classified as.

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Partition chromatography

Gas chromatography

Adsorption Chromatography

Thin layer chromatography

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Question # 5

If fluted fitter paper, rate of filtration increases as compared tot he cone shaped filter paper because.

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It has greater number of holes in it.

It has greater surface are of filtration

Fluted filter paper has greater pore sizes than cone shaped filter paper.

Thickness of paper is more than cone shaped filter paper

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Question # 6

Drying agent used in crystallization is.

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P2O3

Animal charcoal

KMnO4

Water

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Question # 7

Which one of the following is not property of a good solvent.

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It should be inexpensive

It should dissolve impurities easily

It should dissolve large amount of solute at boiling point and less amount of solute at low temperature.

It should not react chemically with solute

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Question # 8

Which of the following substances is used as decolorizing agent.

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Silica gel

Animal charcoal

conc. H2SO4

Asbestos

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Question # 9

Chromatography in which stationary phase is a solid is called.

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Partition chromatography

Paper chromatography

High pressure liquid chromatography

Adsorption chromatography

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