Solutions MCQ Questions for Class 12 Chemistry Chapter 2 with Answers

NCERTCOURSE.COM- Find here the NCERT chapter-wise Multiple Choice Questions from Class 12 Chemistry book Chapter 2 Solutions with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Solutions. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

MCQ Questions for Class 12 Chemistry With Answers

Q1. Which of the following aqueous solutions containing 10 g of solute in each case, has highest m.pt?

(i) NaCl solution
(ii) KC1 solution
(iii) sugar solution
(iv) glucose solution.

(iii) sugar solution

Q2. The molal elevation constant depends upon

(i) nature of solute.
(ii) nature of the solvent.
(iii) vapour pressure of the solution.
(iv) enthalpy change.

(ii) nature of the solvent.

Q3. Which of the following 0.10 m aqueous solutions will have the lowest freezing point ?

(i) Al2(SO4)3
(ii) C6H12O6
(iii) KCl
(iv) C12H22O11

(i) Al2(SO4)3

Q4. The unit of ebullioscopic constant is

(i) K kg mol-1 or K (molality)-1
(ii) mol kg K-1 or K-1 (molality)
(iii) kg mol-1 K-1 or K-1 (molality)-1
(iv) K mol kg-1 or K (molality)

(i) K kg mol-1 or K (molality)-1

Q5. Which of the following solutions (in water) has highest boiling point?

(i) 1 M NaCl
(ii) 1 M MgCl2
(iii) 1M Urea
(iv) 1 M glucose.

(i) 1 M NaCl

Q6. People add sodium chloride to water while boiling eggs. This is to

(i) decrease the boiling point.
(ii) increase the boiling point.
(iii) prevent the breaking of eggs.
(iv) make eggs tasty.

(ii) increase the boiling point.

Q7. The freezing point of equimolal aqueous solution will be highest for

(i) C6H5NH3 +Cl–
(ii) Ca(NO3)2
(iii) La(NO3)2
(iv) C6H12O6

iv) C6H12O6

Q8. Which of the following aqueous solutions should have the highest boiling point?

(i) 1.0 M NaOH
(ii) 1.0 M Na2SO4
(iii) 1.0 M NH4NO3
(iv) 1.0 M KNO3

(ii) 1.0 M Na2SO4

Q9. Which of the following solutions has highest osmotic pressure?

(i) 1 M NaCl
(ii) 1 M MgCl2
(iii) 1 M urea
(iv) 1M glucose.

(i) 1 M NaCl

Q10. Which has the lowest boiling point at 1 atm pressure?

(i) 0.1 M KCl
(ii) 0.1 M Urea
(iii) 0.1 M CaCl2
(iv) 0.1 M A1Cl3

(ii) 0.1 M Urea

Q11. Low concentration of oxygen in the blood and tissues of people living at high altitude is due to

(i) low temperature
(ii) low atmospheric pressure
(iii) high atmospheric pressure
(iv) both low temperature and high atmospheric pressure

(ii) low atmospheric pressure

Q12. The mass of (COOH)2. 2H2O needed to prepare 500 ml of 0.1 molar solution is

(i) 12.6 gm
(ii) 6.3 gm
(iii) 4.5 gm
(iv) 9.0 gm

(ii) 6.3 gm

Q13. An aqueous solution of hydrochloric acid

(i) Obeys Raoult’s law
(ii) Shows negative deviation from Raoult’s law
(iii) Shows positive deviation from Raoult’s law
(iv) Obeys Henry’s law at all compositions

(ii) Shows negative deviation from Raoult’s law

Q14. At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ………….

(i) less than the rate of crystallisation
(ii) greater than the rate of crystallisation
(iii) equal to the rate of crystallisation
(iv) zero

(iii) equal to the rate of crystallisation

Q15. Which of the following is a colligative property?

(i) osmotic pressure
(ii) boiling point
(iii) vapour pressure
(iv) electrical conductivity

(i) osmotic pressure

Q16. A solution containing 10g per dm3 of urea (molecular mass = 60 gmol–1) is isotonic with a 5% solution of a non volatile solute. The molecular mass of this non volatile solute is

(i) 300 g mol–1
(ii) 350 g mol–1
(iii) 200 g mol–1
(ii) 250 g mol–1

(i) 300 g mol–1

Q17. Isotonic solution are the solutions having the same.

(i) surface tension
(ii) concentration
(iii) osmotic pressure
(iv) viscosity

(iii) osmotic pressure

Q18. Exactly 1 g of urea dissolved in 75 g of water gives a solution that boils at 100.114°C at 760 torr. The molecular weight of urea is 60.1. The boiling point elevation constant for water is

(i) 1.02
(ii) 0.51
(iii) 3.06
(iv) 1.51

(ii) 0.51

Q19. Which of the following units is useful in relating concentration of solution with its vapour pressure?

(i) mole fraction
(ii) parts per million
(iii) mass percentage
(iv) molality

(i) mole fraction

Q20. The osmotic pressure of a solution is directly proportional to

(i) the molecular concentration of the solute
(ii) the absolute temperature at a given concentration
(iii) the lowering of vapour pressure
(iv) all the above.

(iv) all the above.

Q21. An aqueous solution of hydrochloric acid

(i) Obeys Raoult’s law
(ii) Shows negative deviation from Raoult’s law
(iii) Shows positive deviation from Raoult’s law
(iv) Obeys Henry’s law at all compositions

(ii) Shows negative deviation from Raoult’s law

Q22. KH value for Ar(g), CO2(g), HCHO (g) and CH4(g) are 40.39, 1.67, 1.83 × 10-5 and 0.413 respectively. Arrange these gases in the order of their increasing solubility.

(i) HCHO < CH4 < CO2 < Ar
(ii) HCHO < CO2 < CH4 < Ar
(iii) Ar < CO2 < CH4 < HCHO
(iv) Ar < CH4 < CO2 < HCHO

(iii)

Q23. A 500 g tooth paste sample has 0.2 g fluoride concentration. What is the concentration of fluorine in terms of ppm level?

(i) 250
(ii) 200
(iii) 400
(iv) 1000

(i) 250

Q24. We have three aqueous solutions of NaCl labelled as ‘A’, ‘B’ and ‘C’ with concentrations 0.1 M, 0.01 M and 0.001 M, respectively. The value of van’t Hoff factor for these solutions will be in the order

(i) iA < iB < iC
(ii) iA > iB > iC
(iii) iA = iB = iC
(iv) iA < iB > iC

(iii) iA = iB = iC

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MCQ Questions for Class 12 Chemistry with Answers

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