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ECAT Chemistry Solutions Online Test

Maan AliLast Updated: April 19, 2025

Chemistry Solutions MCQS Online Test

ECAT Chemistry Solutions Chapter Online Test

Total Questions:	64
Time Allowed:	30 Minutes
Total Marks:	64
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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ECAT Chemistry Solutions Test

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Page 1 of 3

Chemistry

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

-1.86°C

+3.72°C

-3.72°C

+1.86°C

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

Mole fraction

All

Molality

Molarity

3. Which has the minimum freezing point?

One molal urea solution

One molal KCl Solution

One Molal NaCl

One molal CaCI₂

4. Solution of Na2SO4 will be

Acidic

More acidic

Neutral

Basic

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

More fraction of solvent

Pressure of the atmosphere

Molecular weight of the solvent

The mole fraction of Solute

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

Modification of refractive index

Depression in freezing pint

Elevation of boiling point

Osmotic pressure

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

C₂H₅OH and H₂O

H₂O and HBr.

C₆H₆ and CCI₄

CHCI₃ and CH₃ 100 CH₃

8. 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?

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

The solution formed is an ideal solution

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

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

9. A solution of two components is called

Dilute solution

Original solution

Binary solution

Standard solution

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

Elevation of boiling point

Osmotic pressure

Depression of freezing point

Density

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

Freezing point

Osmatic pressure

Lowering of vapour pressure

Elevation of boiling point

12. Beckmann’s apparatus is used to measure

Depression in F.P

Temperature

Pressure

B.P elevation

13. The concentration units independent of temperature would be

Normality

Mass-volume percent

Molarity

Molality

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

Supersaturated

None of these

Unsaturated

Saturated

15. Which is not a colligative property?

Elevation of boiling point

Depression of freezing point

Osmotic pressure

Lowering of vapour pressure

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

900 cmn³

200 cm³

1 dm³

1.8 dm³

17. The liquid pair which is not completely miscible

Benzene and toluene

CH₃OH and water

Alcohol and water

Phenol and water

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

Will show deviations from Raoults law

Will be an ideal solution

Both b & c

Will be non-ideal solution

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

Non-ideal solution

Ideal solution

Zeotropic solution

Azeotropic solution

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

Coordinate compounds

Hydrates

Complexes

Double salts

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

Benzene – methanol

Water – hydrochloric acid

Water – nitric acid

Acetone – chloroform

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

Non-volatile solute

Dilute solution

Non-electrolyte solute

All of these

23. Which inorganic precipitate acts as semipermeable membrane?

Barium oxalate

Copper ferrocyanide

Nickel phosphate

Calcium sulphate

24. Which one will from an ideal solution?

H₂O and HBr.

C₂H₅OH and H₂O

CHCI₃ and CH₃COOCH₃

C₆H₆ and CCI₄

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

Elevation of polling point

Osmotic pressure

Lowering of vapour pressure

Freezing point

Page 2 of 3

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

Osmosis

Cataphoresis

Electrolysis

Electrophoresis

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

Nature of non ovolatile

Amount of liquid

Temperature

Surface area of the container

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

Mole fraction of solute

Molarity

Mole fraction of Solvent

Molality

29. 10ml of alcohol dissolve in 90ml of water unit of concentration used is

% w/v

% v/v

% w/w

% v/w

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

Radical

Solution

Compound

Ion

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

Urea

KCl

Glucose

CaCl₂

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

Molality

Mole fraction

Normality

Molarity

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

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

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

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

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

34. The molal depression constant depends upon

Nature of solute

Nature of solvent

∆H solution

Vapour pressure of solution

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

Solute

Phase

Solution

Solvent

36. The solution which distils over with change in composition

Ideal solution

Non-ideal solution

Zeotropic solution

Azeotropic solution

37. Which of the following is a colligative property?

Sublimation temperature

Osmotic pressure

Freezing point

Melting point

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

Super saturated solution

Dilute solution

Unsaturated solution

Saturated solution

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

Lowering in freezing point

Lowering in B.P

Reducing specific heat

Reducing viscosity

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

None of these

1 normal solution

1 mole solution

1 Molar solution

41. 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).

1.20 eq

2.40 eq

3.60 eq

0.600 eq

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

All of these

Dilute

Saturated solution

Concentrated

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

Paints

Dust particles in smoke

Fog

Opals

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

Super saturated

Azeotropic mixture

Ideal

Amorphous

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

Lowering in freezing pt

Reducing specific heat

Reducing viscosity

Lowering in b.pt.

46. In partially miscible liquids the two layers are

Unsaturated solution of each other

Saturated solution of each other

Normal solution of each other

No layer formation takes place

47. The osmotic pressure of solution increases if

Solution constant is increased

Volume is increased

Temperature is decreased

Number of solute molecules are increased

48. Depression in freezing point is directly to

Molarity of solution

Molarity of solvent

Molality of solvent

Molality of solution

49. The lowest vapour pressure is exerted by

Ethanol

Methanol

Chloroform

Water

50. The molal depression constant depends upon

Nature of solvent

∆H

Nature of solute

Vapour pressure of solution

Page 3 of 3

51. The process of osmosis was first discovered by

Traube

Dutrochet

Nollet

Pfeffer

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

Phase

Solute

Ion

Solvent

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

None of these

Slightly less than the total volume of the components

Equal to the total volume of the components

Slightly more than the total volume of the components

54. Osmotic pressure of a solution increases by

None of these

Increasing the volume

Increasing the number of molecules of the solute

Decreasing the temperature

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

Solvation

Solution

Solvent

Solute

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

Formality

Mole fraction

Molarity

Molality

57. Saturated solution of NaCl on heating becomes

Unsaturated

None

Remains saturated

Super saturated

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

It shows negative deviation from Rault’s law

It is metastable

It is saturated

It show positive deviation from Rault’s law

59. Units of molarity are

Mol/lit

Gm/lit

None

Kg/lit

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

Solute non-electrolyte

Dilute solution

Volatile solute

All

61. Maximum F.P falls in

Water

Naphthalene

Camphor

Benzene

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

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

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

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

Change in temperature of solutions takes place

63. 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.)

0.045 N

0.066 N

0.033 N

0.090 N

64. Isotonic solutions have same

Molality

None of these

Normality

Molar concentration

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Maan AliLast Updated: April 19, 2025

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ECAT Chemistry Solutions Online Test

Chemistry Solutions MCQS Online Test

ECAT Chemistry Solutions Chapter Online Test

ECAT Chemistry Solutions Test

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