FSC Part 1 Chemistry Chapter 2 Experimental Techniques in Chemistry Online Test | ilmkidunya

Chemistry Fsc Part 1 Chapter 2 Online Test

Sr. #	Questions	Answers Choice
1	When hot saturated solution is cooled very rapidly, we get	Medium sized crystals large sized crystals Premature crystallization of the substance Old crops of crystals
2	NaCI and sand can be separated by one of the following without filtration	Formation of solution and filtration Formation of solution and evaporation without filtration Sublimation Chromatiograghy
3	Which of the following precautions in necessary for smooth filtration	The filter paper should be of big size The tip of funnel should not touch the side of the beaker The stem of the funnel should be very small The stem of he funnel should remain continuously full of liquid
4	The comparative rates at which the solutes move in paper chromatography, depends on	The size of paper used Their R<sub>f </sub>values Their partition coefficients The polarity of solvent used
5	Solvent extraction method is particularly useful technique for separation when the product to be separated is	Non-volatile or thermally unstable Volatile or thermally unstable Non-volatile or thermally stable Volatile or unstable
6	Solvent extraction is an equilibrium process and it is controlled by	Law of mass action The amount of solvent used Distribution law The amount of solute
7	During the process of crystallization, the hot saturated solution;	Is cooled very slowly to get large-sized crystals Is cooled at a moderated rate to get medium-sized crystals Is evaporated to get the crystals of the product Is mixed with an immiscible liquid to get the pure crystals of the produce
8	A filtration process could be very time consuming if it were not aided by a gentle suction, which is developed	If the paper covers the funnel up to its circumference If the paper has got small sized pores in it If the stem of the funnel is large so that it dips into the filtrate If the paper fits tightly

Download This Set