Experimental Techniques in Chemistry test 3

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A test from chapter 2 i.e Experimental Techniques in Chemistry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. To achieve a good separation the two liquids are gently shaken to increase their area of

A) miscibility
B) separation
C) contact
D) solubility

2. Chromatography in which stationary phase is solid is called

A) partition chromatography
B) paper chromatography
C) high pressure
D) adsorption chromatography

3. Chromatography involves these distribution of a solution between

A) two stationary phase
B) two mobile phase
C) a stationary phase and a mobile phase
D) two stationary and two mobile phase

4. Chromatography in which the stationary phase is liquid is called

A) partition chromatography
B) descending chromatography
C) column chromatography
D) Adsorption chromatography

5. In paper chromatography the rate at which solutes move depends on

A) distribution law
B) distribution coefficients
C) law of partial pressure
D) law of specific proportion

6. Solvent extraction is an equilibrium process and it is controlled by

A) law of mass action
B) the amount of solvent used
C) distribution law
D) the amount of solute

7. The comparative rates at which the solutes move in paper chromatography depend on

A) the size of paper used
B) Rf values of solutes
C) temperature of the experiment
D) size of the chromatographic tank used

8. A filtration process could be very time consuming if it were not aided by the gentle suction, which is developed

A) if the paper covers the funnel up to its circumference
B) if the paper has got small sized pores in it
C) if the stem of the funnel is large so that it dips into the filtrate
D) if the paper fits tightly

9. Solvent extraction method is particularly useful technique for separation, when product to be separated is

A) non–volatile or thermally unstable
B) volatile or thermally stable
C) non volatile or thermally stable
D) non–volatile or thermally unstable

10. During the process of crystallization, the hot saturated solution

A) is cooled very slowly to get large sized crystals
B) is cooled at a moderate rate to get medium sized crystals
C) is evaporated to get the pure crystals of the product
D) is mixed with an immiscible liquid, to get the pure crystals of the product