{"id":19098,"date":"2023-03-28T12:34:25","date_gmt":"2023-03-28T07:04:25","guid":{"rendered":"https:\/\/ncertsolutions.guru\/?p=19098"},"modified":"2023-03-28T17:19:08","modified_gmt":"2023-03-28T11:49:08","slug":"mcq-questions-for-class-12-chemistry-chapter-2","status":"publish","type":"post","link":"https:\/\/ncertsolutions.guru\/mcq-questions-for-class-12-chemistry-chapter-2\/","title":{"rendered":"MCQ Questions for Class 12 Chemistry Chapter 2 Solutions with Answers"},"content":{"rendered":"

Students are advised to practice the NCERT MCQ Questions for Class 12 Chemistry Chapter 2 Solutions with Answers Pdf free download is available here. MCQ Questions for Class 12 Chemistry with Answers<\/a> are prepared as per the Latest Exam Pattern. Students can solve these Solutions Class 12 MCQs Questions with Answers and assess their preparation level.<\/p>\n

Solutions Class 12 MCQs Questions with Answers<\/h2>\n

Solving the Solutions Multiple Choice Questions of Class 12 Chemistry Chapter 2 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Solutions Class 12 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 2 Chemistry Class 12 and cross-check your answers during preparation.<\/p>\n

Question 1.
\nWhich of the following units is useful in relating concentration of solution with its vapour pressure?
\n(a) mole fraction
\n(b) parts per million
\n(c) mass percentage
\n(d) molality<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) mole fraction<\/p>\n<\/details>\n

\n

Question 2.
\nOn dissolving sugar in water at room temperature, solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?
\n(a) Sugar crystals in cold water.
\n(b) Sugar crystals in hot water.
\n(c) Powdered sugar in cold water.
\n(d) Powdered sugar in hot water.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) Powdered sugar in hot water.<\/p>\n<\/details>\n

\n

Question 3.
\nAt equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ………….
\n(a) less than the rate of crystallisation
\n(b) greater than the rate of crystallisation
\n(c) equal to the rate of crystallisation
\n(d) zero<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) equal to the rate of crystallisation<\/p>\n<\/details>\n

\n

Question 4.
\nA beaker contains a solution of substance \u2018A\u2019. Precipitation of substance \u2018A\u2019 takes place when small amount of \u2018A\u2019 is added to the solution. The solution is ………………
\n(a) saturated
\n(b) supersaturated
\n(c) unsaturated
\n(d) concentrated<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) supersaturated<\/p>\n<\/details>\n

\n

Question 5.
\nMaximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon .
\n(a) temperature
\n(b) nature of solute
\n(c) pressure
\n(d) nature of solvent<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) pressure<\/p>\n<\/details>\n

\n

Question 6.
\nLow concentration of oxygen in the blood and tissues of people living at high altitude is due to
\n(a) low temperature
\n(b) low atmospheric pressure
\n(c) high atmospheric pressure
\n(d) both low temperature and high atmospheric pressure<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) low atmospheric pressure<\/p>\n<\/details>\n

\n

Question 7.
\nConsidering the formation, breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult\u2019s law?
\n(a) Methanol and acetone.
\n(b) Chloroform and acetone.
\n(c) Nitric acid and water.
\n(d) Phenol and aniline.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Methanol and acetone.<\/p>\n<\/details>\n

\n

Question 8.
\nColligative properties depend on
\n(a) the nature of the solute particles dissolved in solution.
\n(b) the number of solute particles in solution.
\n(c) the physical properties of the solute particles dissolved in solution.
\n(d) the nature of solvent particles.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) the number of solute particles in solution.<\/p>\n<\/details>\n

\n

Question 9.
\nWhich of the following aqueous solutions should have the highest boiling point?
\n(o) 1.0 M NaOH
\n(b) 1.0 M Na2<\/sub>SO4<\/sub>
\n(c) 1.0 M NH4<\/sub>NO3<\/sub>
\n(d) 1.0 M KNO3<\/sub><\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) 1.0 M Na2<\/sub>SO4<\/sub><\/p>\n<\/details>\n

\n

Question 10.
\nThe unit of ebullioscopic constant is
\n(a) K kg mol-1<\/sup> or K (molality)-1<\/sup>
\n(b) mol kg K-1<\/sup> or K-1<\/sup> (molality)
\n(c) kg mol-1<\/sup> K-1<\/sup> or K-1<\/sup> (molality)-1<\/sup>
\n(d) K mol kg-1<\/sup> or K (molality)<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) K kg mol-1<\/sup> or K (molality)-1<\/sup><\/p>\n<\/details>\n

\n

Question 11.
\nIn comparison to a 0.01 M solution of glucose, the depression in freezing point of a 0.01 M MgCl2<\/sub> solution is ………..
\n(a) the same
\n(b) about twice
\n(c) about three times
\n(d) about six times<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) about three times<\/p>\n<\/details>\n

\n

Question 12.
\nAn unripe mango placed in a concentrated salt solution to prepare pickle shrivels because ………..
\n(a) it gains water due to osmosis.
\n(b) it loses water due to reverse osmosis.
\n(c) it gains water due to reverse osmosis.
\n(d) it loses water due to osmosis.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) it loses water due to osmosis.<\/p>\n<\/details>\n

\n

Question 13.
\nAt a given temperature, osmotic pressure of a concentrated solution of a substance
\n(a) is higher than that of a dilute solution.
\n(b) is lower than that of a dilute solution.
\n(c) is same as that of a dilute solution.
\n(d) cannot be compared with osmotic pressure of dilute solution.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) is higher than that of a dilute solution.<\/p>\n<\/details>\n

\n

Question 14.
\nWhich of the following statements is false?
\n(a) Two different solutions of sucrose of same molality prepared in different solvents will have the same depression in freezing point.
\n(b) The osmotic pressure of a solution is given by the equation \u03c0 = cRT (where c is the molarity of the solution).
\n(c) Decreasing order of osmotic pressure for 0.01 M aqueous solutions of barium chloride, potassium chloride, acetic acid and sucrose is BaCl2<\/sub> > KCl > CH3<\/sub>COOH > sucrose.
\n(d) According to Raoult\u2019s law, the vapour pressure exerted by a volatile component of a solution is directly proportional to its mole fraction in the solution.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Two different solutions of sucrose of same molality prepared in different solvents will have the same depression in freezing point.<\/p>\n<\/details>\n

\n

Question 15.
\nThe values of Van\u2019t Hoff factors for KCl, NaCl and K2<\/sub>SO4<\/sub>, respectively, are
\n(a) 2, 2 and 2
\n(b) 2, 2 and 3
\n(c) 1,1 and 2
\n(d) 1, 1 and 1<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) 2, 2 and 3<\/p>\n<\/details>\n

\n

Question 16.
\nWhich of the following statements is false?
\n(a) Units of atmospheric pressure and osmotic pressure are the same.
\n(b) In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute to a region of higher concentration.
\n(c) The value of molal depression constant depends on nature of solvent.
\n(d) Relative lowering of vapour pressure is a dimensionless quantity.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute to a region of higher concentration.<\/p>\n<\/details>\n

\n

Question 17.
\nValue of Henry\u2019s constant, KH<\/sub>
\n(a) increases with increase in temperature.
\n(b) decreases with increase in temperature.
\n(c) remains constant.
\n(d) first increases then decreases.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) increases with increase in temperature.<\/p>\n<\/details>\n

\n

Question 18.
\nThe value of Henry\u2019s constant KH<\/sub> is
\n(a) greater for gases with higher solubility.
\n(b) greater for gases with lower solubility.
\n(c) constant for all gases.
\n(d) not related to the solubility of gases.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) greater for gases with lower solubility.<\/p>\n<\/details>\n

\n

Question 19.
\nConsider the figure given below and mark the correct option.
\n\"MCQ
\n(a) Water will move from side (A) to side (B) if a pressure lower than osmotic pressure is applied on piston (B).
\n(b) Water will move from side (B) to side (A) if a pressure greater than osmotic pressure is applied on piston (B).
\n(c) Water will move from side (B) to side (A) if a pressure equal to osmotic pressure is applied on piston (B).
\n(d) Water will move from side (A) to side (B) if pressure equal to osmotic pressure is applied on piston (A).<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Water will move from side (B) to side (A) if a pressure greater than osmotic pressure is applied on piston (B).<\/p>\n<\/details>\n

\n

Question 20.
\nWe have three aqueous solutions of NaCl labelled as \u2018A\u2019, \u2018B\u2019 and \u2018C\u2019 with concentrations 0.1 M, 0.01 M and 0.001 M, respectively. The value of van\u2019t Hoff factor for these solutions will be in the order
\n(a) iA<\/sub> < iB<\/sub> < iC<\/sub>
\n(b) iA<\/sub> > iB<\/sub> > iC<\/sub>
\n(c) iA<\/sub> = iB<\/sub> = iC<\/sub>
\n(d) iA<\/sub> < iB<\/sub> > iC<\/sub><\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) iA<\/sub> = iB<\/sub> = iC<\/sub><\/p>\n<\/details>\n

\n

Question 21.
\nOn the basis of information given below mark the correct option.
\nInformation:
\n(A) In bromoethane and chloroethane mixture, intermolecular interactions of A-A and B-B types are nearly same as A-B type interactions.
\n(B) In ethanol and acetone mixture, A-A or B-B type intermolecular interactions are stronger than A-B
\ntype interactions.
\n(C) In chloroform and acetone mixture, A-A or B-B type intermolecular interactions are weaker than A-B type interactions.
\n(a) Solutions (B) and (C) will follow Raoult\u2019s law.
\n(b) Solution (A) will follow Raoult\u2019s law.
\n(c) Solution (B) will show negative deviation from Raoult\u2019s law.
\n(d) Solution (C) will show positive deviation from Raoult\u2019s law.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Solution (A) will follow Raoult\u2019s law.<\/p>\n<\/details>\n

\n

Question 22.
\nTwo beakers of capacity 500 mL were taken. One of these beakers, labelled as \u201cA\u201d, was filled with 400 mL water whereas the beaker labelled \u201cB\u201d was filled with 400 mL of 2 M solution of NaCl. At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in the figure given below:
\n\"MCQ
\nAt a given temperature, which of the following statements is correct about the vapour pressure of pure water and that of NaCl solution?
\n(a) Vapour pressure in container (A) is more than that in container (B).
\n(b) Vapour pressure in container (A) is less than that in container (B).
\n(c) Vapour pressure is equal in both the containers.
\n(d) Vapour pressure in container (B) is twice the vapour pressure in container (A).<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Vapour pressure in container (A) is more than that in container (B).<\/p>\n<\/details>\n

\n

Question 23.
\nIf two liquids A and B form minimum boiling azeotrope at some specific composition, then .
\n(a) A-B interactions are stronger than those between A-A or B-B.
\n(b) Vapour pressure of solution increases because more number of molecules of liquids A and B can escape from the solution.
\n(c) Vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution.
\n(d) A-B interactions are weaker than those between A-A or B-B.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) A-B interactions are weaker than those between A-A or B-B.<\/p>\n<\/details>\n

\n

Question 24.
\n4 L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is
\n(a) 0.004
\n(b) 0.008
\n(c) 0.012
\n(d) 0.016<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) 0.016<\/p>\n<\/details>\n

\n

Question 25.
\nOn the basis of information given below mark the correct option.
\nInformation: On adding acetone to methanol some of the hydrogen bonds between methanol molecules break.
\n(a) At specific composition, methanol- acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoult\u2019s law.
\n(b) At specific composition, methanol- acetone mixture forms maximum boiling azeotrope and will show positive deviation from Raoult\u2019s law.
\n(c) At specific composition, methanol- acetone mixture will form minimum boiling azeotrope and will show negative deviation from Raoult\u2019s law.
\n(d) At specific composition, methanol- acetone mixture will form maximum boiling azeotrope and will show
\nnegative deviation from Raoult\u2019s law.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) At specific composition, methanol- acetone mixture will form minimum boiling azeotrope and will show positive deviation from Raoult\u2019s law.<\/p>\n<\/details>\n

\n

Question 26.
\nKH<\/sub> value for Ar(g), CO2<\/sub>(g), HCHO (g) and CH4<\/sub>(g) are 40.39, 1.67, 1.83 \u00d7 10-5<\/sup> and 0.413 respectively.
\nArrange these gases in the order of their increasing solubility.
\n(a) HCHO < CH4<\/sub> < CO2<\/sub> < Ar
\n(b) HCHO < CO2<\/sub> < CH4<\/sub> < Ar
\n(c) Ar < CO2<\/sub> < CH4<\/sub> < HCHO
\n(d) Ar < CH4<\/sub> < CO2<\/sub> < HCHO<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Ar < CO2<\/sub> < CH4<\/sub> < HCHO<\/p>\n<\/details>\n

\n

Assertion and Reason Type Questions<\/span><\/p>\n

The questions given below consist of an assertion and a reason. Use the following key to choose the appropriate answer.
\n(a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
\n(b) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).
\n(c) Assertion (A) is correct, Reason (R) is wrong statement.
\n(d) Assertion (A) is wrong, but Reason (R) is correct statement.<\/p>\n

Question 27.
\nAssertion: \u0394Hmix<\/sub> and \u0394Vmix<\/sub> are zero for the ideal solution.
\nReason: The interactions between the particles of the components of a solution are almost identical as between particles in the liquids.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).<\/p>\n<\/details>\n

\n

Question 28.
\nAssertion: Increasing pressure on water decreases its freezing point.
\nReason: Density of water is maximum at 273 K.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Assertion (A) is correct, Reason (R) is wrong statement.<\/p>\n<\/details>\n

\n

Question 29.
\nAssertion: 0.1 M glucose solution has higher increment in the freezing point than 0.1 M urea solution.
\nReason: Kf<\/sub> for both has same values.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (d) Assertion (A) is wrong, but Reason (R) is correct statement.<\/p>\n<\/details>\n

\n

Question 30.
\nAssertion: Cooking time in pressure cookers is reduced.
\nReason: Boiling point inside the pressure cooker is raised.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).<\/p>\n<\/details>\n

\n

Question 31.
\nAssertion: The sum of mole fractions of all components of a solution is unity.
\nReason: Mole fraction is independent of temperature.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (b) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).<\/p>\n<\/details>\n

\n

Question 32.
\nAssertion: Sodium chloride is used to clear snow on the roads.
\nReason: Sodium chloride depresses the freezing point of water.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).<\/p>\n<\/details>\n

\n

Question 33.
\nAssertion: Osmotic pressure of 0.1 M urea solution is less than that of 0.1 M NaCl solution.
\nReason: Osmotic pressure is not a colligative property.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Assertion (A) is correct, Reason (R) is wrong statement.<\/p>\n<\/details>\n

\n

Question 34.
\nAssertion: Elevation in boiling point for two isotonic solutions may not be same.
\nReason: Boiling point depends upon the concentration of the solute.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Assertion (A) is correct, Reason (R) is wrong statement.<\/p>\n<\/details>\n

\n

Question 35.
\nAssertion: Iodine is more soluble in CCl4<\/sub> than in water.
\nReason: Non-polar solutes are more soluble in non-polar solvents.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).<\/p>\n<\/details>\n

\n

Question 36.
\nAssertion: Camphor is usually used in molecular mass determination.
\nReason: Camphor has low cryoscopic constant and therefore, causes greater depression in freezing point.<\/p>\n

\nAnswer<\/span><\/summary>\n

Answer: (c) Assertion (A) is correct, Reason (R) is wrong statement.<\/p>\n<\/details>\n

\n

Hope the information shared regarding the NCERT MCQ Questions for Class 12 Chemistry Chapter 2 Solutions with Answers Pdf free download is true and genuine as far as our knowledge is concerned. If you feel any information regarding CBSE Class 12 Chemistry Solutions MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly.<\/p>\n","protected":false},"excerpt":{"rendered":"

Students are advised to practice the NCERT MCQ Questions for Class 12 Chemistry Chapter 2 Solutions with Answers Pdf free download is available here. MCQ Questions for Class 12 Chemistry with Answers are prepared as per the Latest Exam Pattern. Students can solve these Solutions Class 12 MCQs Questions with Answers and assess their preparation …<\/p>\n

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