Solutions Chemistry Class 12 MCQ PDF Download

Solutions Chemistry Class 12 MCQ PDF We have provided you with Solutions Chemistry Class 12 MCQ PDF with Answers free download as per latest CBSE syllabus. To score good marks in your exam practice these MCQ Questions on a daily basis.You can also get an unseen passage for class 4 to 12 in hindi and english here.

Question. Mole fraction of glycerine C3H5(OH)3 in solution containing 36 g of water and 46 g of glycerine is (a) 0.46 (b) 0.40 (c) 0.20 (d) 0.36 Answer Question. Which of the following is a quantitative description of the solution? (a) Dilute (b) Concentrated (c) Saturated (d) Molar Answer Question. When a solute is present in trace quantities the following expression is used (a) Gram per million (b) Milligram percent (c) Microgram percent

(d) Parts per million Answer Question. Iodine and sulphur dissolve in (a) water (b) benzene (c) carbon disulphide (d) ethanol Answer Question. The liquids at a given temperature vapourise and under equilibrium conditions the pressure exerted by the vapours of the liquid over the liquid phase is called (a) osmotic pressure (b) atmospheric pressure (c) hydrostatic pressure (d) vapour pressure Answer Question. The vapour pressure of the solution at a given temperature is found to be …………… than the vapour pressure of the pure solvent at the same temperature. (a) higher (b) lower (c) equal (d) can’t calculate Answer

Question. The decrease in the vapour pressure of solvent depends on the (a) quantity of non-volatile solute present in the solution

(b) nature of non-volatile solute present in the solution (c) molar mass of non-volatile solute present in the solution (d) physical state of non-volatile solute present in the solution Answer Question. Which of the following liquid pairs shows a positive deviation from Raoult’s law ? (a) Water – Nitric acid (b) Benzene – Methanol (c) Water – Hydrochloric acid (d) Acetone – Chloroform Answer Question. A solution of acetone in ethanol (a) shows a positive deviation from Raoult’s law (b) behaves like a non ideal solution (c) obeys Raoult’s law (d) shows a negative deviation from Raoult’s law Answer Question. Negative deviation from Raoult’s law is observed in which one of the following binary liquid mixtures?

(a) Ethanol and acetone (b) Benzene and toluene (c) Acetone and chloroform (d) Chloroethane and bromoethane Answer Question. Which one of the following binary liquid systems shows positive deviation from Raoult’s law? (a) Benzene-toluene (b) Carbon disulphide-acetone (c) Phenol-aniline (d) Chloroform-acetone Answer Question. An ideal solution is formed when its components (a) have no volume change on mixing (b) have no enthalpy change on mixing (c) Both (a) and (b) are correct (d) Neither (a) nor (b) is correct Answer Question. Which is an application of Henry’s law? (a) Spray paint (b) Bottled water (c) Filling up atire

(d) Soft drinks (soda) Answer Question. Scuba divers may experience a condition called ______. To avoids this, the tanks used by scuba divers are filled with air diluted with _____ . (a) Migrains, Hydrogen (b) Cramps, Nitrogen (c) Nausea, Oxygen (d) Bends, Helium Answer Question. Sprinkling of salt helps in clearing the snow covered roads in hills. The phenomenon involved in the process is (a) lowering in vapour pressure of snow (b) depression in freezing point of snow (c) melting of ice due to increase in temperature by putting salt (d) increase in freezing point of snow Answer Question. The values of Van’t Hoff factors for KCl, NaCl and K2SO4, respectively, are (a) 2, 2 and 2 (b) 2, 2 and 3 (c) 1,1 and 2 (d) 1, 1 and 1 Answer

Question. A solution containing 10.2 g glycerine per litre is isotonic with a 2% solution of glucose. What is the molecular mass of glycerine? (a) 91.8 g (b) 1198 g (c) 83.9 g (d) 890.3 g Answer Question. At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is …………. (a) less than the rate of crystallisation (b) greater than the rate of crystallisation (c) equal to the rate of crystallisation (d) zero Answer Question. Molarity of liquid HCl will be, if density of solution is 1.17 gm/cc (a) 36.5 (b) 32.05 (c) 18.25 (d) 42.10 Answer Question. 4 L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is (a) 0.004

(b) 0.008 (c) 0.012 (d) 0.016 Answer Question. What will be the degree of dissociation of 0.1 M Mg(NO3)2 solution if van’t Hoff factor is 2.74? (a) 75% (b) 87% (c) 100% (d) 92% Answer Question. The density of a solution prepared by dissolving 129g of urea in 1000g of water is 1.15g/ml. The molarity of this solution is (a) 1.78M (b) 1.02M (c) 2.05M (d) 0.50M Answer Question. Colligative properties depend on (a) the nature of the solute particles dissolved in solution. (b) the number of solute particles in solution. (c) the physical properties of the solute particles dissolved in solution. (d) the nature of solvent particles.

Answer Question. Mixing up equal volumes of 0.1M NaOH and 0.1M CH3COOH yields a solution which is (a) basic (b) acidic (c) neutral (d) None Answer Question. If 2 gm of NaOH is present is 200 ml of its solution, its molarity will be (a) 0.25 (b) 0.5 (c) 5 (d) 10 Answer Question. Which of the following concentration terms is/are independent of temperature? (a) Molality only (b) Molality and mole fraction (c) Molarity and mole fraction (d) Molality and normality Answer Question. A solution is prepared by dissolving 10 g NaOH in 1250 mL of a solvent of density 0.8 mL/g. The molality of the solution in mol kg–1 is

(a) 0.25 (b) 0.2 (c) 0.008 (d) 0.0064 Answer Question. Which of the following is a quantitative description of the solution? (a) Dilute (b) Concentrated (c) Saturated (d) Molar Answer Question. At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ____________. (a) less than the rate of crystallisation (b) greater than the rate of crystallisation (c) equal to the rate of crystallisation (d) zero Answer

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