Chemistry Solutions Online Mcqs Test

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Question 1

1. Units of molarity are

Question 2

2. Solution which distill without change in composition or temperature are called

Answer

Super saturated

Answer

Azeotropic mixture

Question 3

3. Which of the following are the conditions of colligative properties?

Answer

All of these

Answer

Non-electrolyte solute

Answer

Non-volatile solute

Answer

Dilute solution

Question 4

4. Number of moles in 1 kg of solvent is called

Answer

Mole fraction

Question 5

5. Which of the following unit of concentration is independent of temperature?

Answer

Mole fraction

Question 6

6. In partially miscible liquids the two layers are

Answer

Unsaturated solution of each other

Answer

No layer formation takes place

Answer

Normal solution of each other

Answer

Saturated solution of each other

Question 7

7. For dilute solution, Raoult’s law states that:

Answer

The relative lowering of vapour pressure is proportional to amount of solute

Answer

The vapor pressure of the solution is equal to mole fraction of the solvent

Answer

The lowering of vapor pressure is equal to the mole fraction of solute in solution

Answer

The relative lowering of vapour pressure is equal to mole fraction of solute

Question 8

8. Azeotropic mixture of two liquids boil at a lower temperature than either of them, when

Answer

It shows negative deviation from Rault’s law

Answer

It is saturated

Answer

It is metastable

Answer

It show positive deviation from Rault’s law

Question 9

9. The lowest vapour pressure is exerted by

Answer

Chloroform

Question 10

10. The vapour pressure of a liquid in a closed container depends upon

Answer

Temperature

Answer

Surface area of the container

Answer

Nature of non ovolatile

Answer

Amount of liquid

Question 11

11. In azeotropic mixture showing positive deviation from Rault’s law, the volume of the mixture is

Answer

Slightly less than the total volume of the components

Answer

None of these

Answer

Slightly more than the total volume of the components

Answer

Equal to the total volume of the components

Question 12

12. The compounds in which water molecules are added are called

Answer

Coordinate compounds

Answer

Double salts

Question 13

13. Isotonic solutions have same

Answer

Molar concentration

Answer

None of these

Question 14

14. Depression in freezing point is directly to

Answer

Molality of solvent

Answer

Molarity of solvent

Answer

Molarity of solution

Answer

Molality of solution

Question 15

15. Which of the following liquid pairs shows a positive deviation from Raoult’s law?

Answer

Water – hydrochloric acid

Answer

Benzene – methanol

Answer

Acetone – chloroform

Answer

Water – nitric acid

Question 16

16. Which of the following solutions of H₂SO₄ is more concentrated?

Answer

None of these

Answer

1 normal solution

Answer

1 mole solution

Answer

1 Molar solution

Question 17

17. Which of the following are the conditions of colligative properties?

Answer

Dilute solution

Answer

Volatile solute

Answer

Solute non-electrolyte

Question 18

18. Which is not a colligative property?

Answer

Depression of freezing point

Answer

Lowering of vapour pressure

Answer

Elevation of boiling point

Answer

Osmotic pressure

Question 19

19. Which of the following is not a colligative property?

Answer

Osmotic pressure

Answer

Depression of freezing point

Answer

Elevation of boiling point

Question 20

20. The liquid pair which is not completely miscible

Answer

CH₃OH and water

Answer

Phenol and water

Answer

Benzene and toluene

Answer

Alcohol and water

Question 21

21. In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

Answer

Reducing viscosity

Answer

Reducing specific heat

Answer

Lowering in b.pt.

Answer

Lowering in freezing pt

Question 22

22. Solution with maximum concentration of solute at given temperature is called

Answer

Super saturated solution

Answer

Saturated solution

Answer

Dilute solution

Answer

Unsaturated solution

Question 23

23. Homogeneous mixture of two or more than two compounds is called

Question 24

24. If the volume of solution is equal to sum of volumes of its all components then the solution

Answer

Will be non-ideal solution

Answer

Will be an ideal solution

Answer

Both b & c

Answer

Will show deviations from Raoults law

Question 25

25. Solution of Na2SO4 will be

Answer

More acidic

Question 26

26. In cold countries ethylene glycol is added to water in radiators of cars during winter, It results in

Answer

Reducing viscosity

Answer

Lowering in freezing point

Answer

Reducing specific heat

Answer

Lowering in B.P

Question 27

27. The solution which does not boil at a particular temperature

Answer

Azeotropic solution

Answer

Ideal solution

Answer

Zeotropic solution

Answer

Non-ideal solution

Question 28

28. Which of the following is a colligative property?

Answer

Sublimation temperature

Answer

Freezing point

Answer

Osmotic pressure

Answer

Melting point

Question 29

29. The relative lowering of vapour pressure is directly proportional to molality if the solution is

Answer

Saturated solution

Answer

All of these

Answer

Concentrated

Question 30

30. What happens when isotonic solution of A (mol. Wt. 342) and B (mol. wt 60) are put in to communication through semipermeable membrane?

Answer

No transference of solvent from solution A to that of B takes place

Answer

Change in temperature of solutions takes place

Answer

Transference of solvent from solution B to that of A takes place

Answer

Transference of solvent from solution A to that of B take place

Question 31

31. According to Raoult’s law, the relative lowering of vapour pressure is equal to

Answer

Pressure of the atmosphere

Answer

The mole fraction of Solute

Answer

Molecular weight of the solvent

Answer

More fraction of solvent

Question 32

32. Maximum F.P falls in

Answer

Naphthalene

Question 33

33. Which of the following is an example of liquid solute and gas solvent?

Answer

Dust particles in smoke

Question 34

34. A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following statement is correct regarding the behavior of the solution?

Answer

n-heptane shows +ve deviation while ethanol shows – ve deviation from Raoult’s Law

Answer

The solution is non-ideal, showing +ve deviation from Raoult’s Law

Answer

The solution is non-ideal, showing – ve deviation from Raoult’s Law

Answer

The solution formed is an ideal solution

Question 35

35. The process of osmosis was first discovered by

Question 36

36. Which of the following is not a colligative property?

Answer

Elevation of boiling point

Answer

Depression in freezing pint

Answer

Osmotic pressure

Answer

Modification of refractive index

Question 37

37. If ionic product of solution is greater than solubility products, the solution is

Answer

Supersaturated

Answer

Unsaturated

Answer

None of these

Question 38

38. Beckmann’s apparatus is used to measure

Answer

Temperature

Answer

B.P elevation

Answer

Depression in F.P

Question 39

39. The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

Question 40

40. The movement of solvent molecules through a semipermeable membrane is called

Answer

Electrophoresis

Answer

Electrolysis

Answer

Cataphoresis

Question 41

41. A homogeneous mixture of two or more than two chemical substances is called

Question 42

42. The molal depression constant depends upon

Answer

Nature of solvent

Answer

Vapour pressure of solution

Answer

Nature of solute

Question 43

43. Which has the minimum freezing point?

Answer

One molal urea solution

Answer

One molal KCl Solution

Answer

One Molal NaCl

Answer

One molal CaCI₂

Question 44

44. Which of the following will form an ideal solution?

Answer

C₂H₅OH and H₂O

Answer

CHCI₃ and CH₃ 100 CH₃

Answer

C₆H₆ and CCI₄

Answer

H₂O and HBr.

Question 45

45. The molal elevation constant is the ratio of the elevation in boiling point to

Answer

Mole fraction of solute

Answer

Mole fraction of Solvent

Question 46

46. Which inorganic precipitate acts as semipermeable membrane?

Answer

Copper ferrocyanide

Answer

Calcium sulphate

Answer

Nickel phosphate

Answer

Barium oxalate

Question 47

47. Calculate the normality of a solution that contains 4.5 g of (COOH)₂ in 3000 mL of solution? (Assume the (COOH)₂ is to be completely neutralized in an acid-base reaction.)

Question 48

48. Which of the following is not a colligative property?

Answer

Elevation of boiling point

Answer

Osmatic pressure

Answer

Freezing point

Answer

Lowering of vapour pressure

Question 49

49. Saturated solution of NaCl on heating becomes

Answer

Remains saturated

Answer

Super saturated

Answer

Unsaturated

Question 50

50. The concentration units independent of temperature would be

Answer

Mass-volume percent

Question 51

51. At 25°C, the highest osmotic pressure is exhibited by 0.1 M solution of

Question 52

52. A solution of glucose is 10%. The volume in which 1 g mole of it is dissolved will be

Question 53

53. Osmotic pressure of a solution increases by

Answer

Increasing the volume

Answer

Decreasing the temperature

Answer

Increasing the number of molecules of the solute

Answer

None of these

Question 54

54. The component of solution which is in smaller amount is called

Question 55

55. Which of the following in not a colligative property?

Answer

Lowering of vapour pressure

Answer

Osmotic pressure

Answer

Freezing point

Answer

Elevation of polling point

Question 56

56. Number of moles of solute dissolved in 1 kg of solvent is called

Answer

Mole fraction

Question 57

57. The solution which distils over with change in composition

Answer

Zeotropic solution

Answer

Non-ideal solution

Answer

Azeotropic solution

Answer

Ideal solution

Question 58

58. Every sample of matter with uniform properties and fixed composition is called

Question 59

59. The molal depression constant depends upon

Answer

Nature of solute

Answer

Nature of solvent

Answer

Vapour pressure of solution

Answer

∆H solution

Question 60

60. A solution of two components is called

Answer

Original solution

Answer

Binary solution

Answer

Standard solution

Answer

Dilute solution

Question 61

61. How many equivalents of phosphoric acid are contained in 300 mL of 4.00 M phosphoric acid? (Assume the acid is to be completely neutralized by a base).

Question 62

62. The osmotic pressure of solution increases if

Answer

Volume is increased

Answer

Number of solute molecules are increased

Answer

Solution constant is increased

Answer

Temperature is decreased

Question 63

63. Which one will from an ideal solution?

Answer

C₆H₆ and CCI₄

Answer

CHCI₃ and CH₃COOCH₃

Answer

C₂H₅OH and H₂O

Answer

H₂O and HBr.

Question 64

64. 10ml of alcohol dissolve in 90ml of water unit of concentration used is

Total Questions:	64
Time Allowed:	30 Minutes
Total Marks:	64
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