Chemistry Mcq Questions Fr Class 11 Pdf Download Chapter 9 | Online Mcq Test For Class 11 Chemistry

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Chapter 9

Solutions

1. Depression in the freezing point is directly proportional to:

1. Molarity of solution
2. Molality of solution
3. Molality of solvent
4. None

2. Molarity of solution is expressed in:

1. Moles/kg
2. g.dm ³
3. dm³ mole^-1
4. mole. dm³

3. The no. of moles of solute dissolved per dm³ of solution is called which among the following:

1. Molarity
2. Molality
3. Normality
4. Mole fraction

4. Benzene – ether can form:

1. Ideal solution
2. Non-ideal solution
3. Buffer solution
4. None of these

5. In a mixture of 28 grams of N₂ and 96 grams of O₂ the mole fraction of N₂:

1. 1.1
2. 0.51
3. 0.25
4. 0.11

6. Which salt dissolves in water to form a solution with a pH greater than 7. 

1. Naci
2. CuSO₄
3. Na₂CO₃
4. NHẠC

7. The number of moles of solute per kilogram of solvent is called:

1. Molality
2. Molarity
3. Mole-fraction
4. Normality

8. 0.1 molar of solute dissolved in 100g of the solvent will be:

1. 0.1 molar
2. 1.0 molal
3. 0.5 molal
4. none of these

10. The amount of NaOH required to prepared 250 cm of 1M solution in grams is:

1. 10
2. 15
3. 20
4. 25

11. 10g NaOH dissolved per 250 cm³ of solution has molality:

1. 0.5 M
2. 1.0M
3. 1.5 M
4. 2.0 M

12. The azeotropic mixture of solution showing positive deviation can be distilled at boiling point.

1. Maximum
2. Minimum
3. No sharp
4. None of these

13. The hydration energy of Br ion is_ _than F^– ion:

1. Equal to
2. Smaller than
3. Greater than
4. None of these

14. The molal boiling point elevation depends upon.

1. Nature of solvent
2. Vapour pressure of solution
3. Nature of solute
4. pH of solution

15. Chemical used to protect a car by preventing the liquid in the radiator from freezing is:

1. Phenol
2. Ethylene glycol
3. KNO₃
4. Methanol

16. Which is a Colligative property?

1. Change in vapour pressure of a solution
2. Change in free energy of a solution (
3. Solvent in the solution
4. Lowering of vapour pressure of a solution

17. The concentration of solute in the solution when it is in equilibrium with the solid substance at a particular temperature is called its:

1. Solubility Be
2. Molarity
3. Molality
4. Mole fraction

18. Molar concentration is called:

1. Active mass
2. Weight
3. Mass
4. None of these

19. An aqueous solution of potassium acetate (CH₃OOK) is:

1. Acidic
2. Basic
3. Neutral
4. Amphoteric

20. 2g of NaOH is dissolved in 500 cm³ of solution. The molarity of the solution is:

1. 2.0 M
2. 1.0 M
3. 0.2
4. 0.1 M

21. Which one of the following gives acidic solution when dissolved in H2O?

1. Naci
2. Na₂SO₄
3. NH₄Cl
4. CH₃COONH₄

22. In a mixture of 7g of N₂ and 8g of O₂ the mole fraction of O₂ is:

1. 1
2. 0.2
3. 0.5
4. 0.2

23. Cheese and butter are the example of solution of:

1. Liquid in liquid
2. Solid in solid
3. Liquid in solid
4. Solid in liquid

24. A solution containing 5.3 g of Na₂CO₃ dissolved per dm’ is:

1. 1.0 M Ta
2. 0.1M
3. 0.5 M
4. 0.05 M

25. Water of crystallization of CuSO₄ is:

1. five
2. ten
3. two
4. Six

26. If we dissolve Na₂SO₄ in water then the solution is:

1. Acidic
2. Basic
3. Neutral
4. All of these

27. Solution containing relatively lower concentrations of solutes are called:

1. Dilute solutions
2. Concentrated solutions
3. Saturated solutions
4. Ideal solutions

28. The critical solution temperature of phenol-water system is:

1. 35.6°C
2. 49.5°C
3. 57.8°C
4. 65.9°C

29. Which one of the following is an ideal solution: d

1. CH₃OH and H₂O
2. C₆H₆ and CCl₄
3. CHCl₃ and (CH₃)₂CO
4. H₂O and HCI

30. The mass of Glucose required to prepare 1 dm of 20% glucose solution is:

1. 18g
2. 180g
3. 369
4. 200g