11th Class FSc Part 1 Chemistry Chapter Wise Online MCQ Test With Answer PDF

Chemistry Fsc Part 1 Online Test

Sr. #	Questions	Answers Choice
1	The crystallization of a solid substance is done from a hot saturated solution. The solution is	Evaporated rapidly Cooled very slowly to get good crystals Cooled rapidly to get excellent crystals Mixed with another miscible solvent
2	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	Actual yield is mostly less than the theoretical yield due to the reason that	Rates of reactions are slow Loss of the product during handling Reactions are never completed 100% Law of conservation of mass is not true
11	A limiting reactant is that one which	Gives greatest number of moles of products Gives least number of moles of products Is left behind after the completion of reaction Is mostly a cheaper substance as compared to other reactants
12	How many moles of AgCI are produced by combination of 1.0 mole of AgNO₃and 2.0 mole of NaCI	1.0 2.0 3.0 4.0
13	In stoichiometric calculations	The reaction can be reversile Side products can be formed Law of conservation of mass may not be obeyed Law of definite proportions is definitely obeyed
14	One mole of CH₃OH and one mole of C₂H₅OH have	Equal number of atoms Equal number of molecules Equal number of electrons Equal number of protons
15	The volume occupied by 1.6 g of O₂at STP is	22.4 dm<sup>3</sup> 2.24 dm<sup>3</sup> 1.12 dm<sup>3</sup> 112 dm<sup>3</sup>
16	I molar volume of a gas at S.T.P is occupied by	1 g of gas 6 x 10<sup>23</sup>g of gas 22.4 m<sup>3</sup>of gas 1 gram molecular mass of gas
17	Which of the following compound has the highest % o f oxygen by weight	CH<sub>3</sub>- OH C<sub>2</sub>H<sub>5</sub>OH HCOOH H<sub>2</sub>O

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