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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 osmotic pressure of solution increases if

Number of solute molecules are increased

Solution constant is increased

Volume is increased

Temperature is decreased

2. Which inorganic precipitate acts as semipermeable membrane?

Nickel phosphate

Copper ferrocyanide

Barium oxalate

Calcium sulphate

3. Depression in freezing point is directly to

Molality of solvent

Molarity of solution

Molarity of solvent

Molality of solution

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

Solution

Solute

Phase

Solvent

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

Depression in freezing pint

Modification of refractive index

Elevation of boiling point

Osmotic pressure

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

Slightly more than the total volume of the components

Equal to the total volume of the components

None of these

Slightly less than the total volume of the components

7. 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 viscosity

Reducing specific heat

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

Solute

Phase

Ion

Solvent

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

Paints

Opals

Fog

Dust particles in smoke

10. Maximum F.P falls in

Naphthalene

Camphor

Benzene

Water

11. 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).

3.60 eq

1.20 eq

2.40 eq

0.600 eq

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

Acetone – chloroform

Water – nitric acid

Water – hydrochloric acid

Benzene – methanol

13. Beckmann’s apparatus is used to measure

Temperature

B.P elevation

Pressure

Depression in F.P

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

+3.72°C

+1.86°C

-3.72°C

-1.86°C

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

Molality

Mole fraction

Molarity

All

16. Osmotic pressure of a solution increases by

Increasing the number of molecules of the solute

Decreasing the temperature

Increasing the volume

None of these

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

1.8 dm³

200 cm³

1 dm³

900 cmn³

18. The process of osmosis was first discovered by

Nollet

Pfeffer

Traube

Dutrochet

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

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

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

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

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

20. 10ml of alcohol dissolve in 90ml of water unit of concentration used is

% v/v

% v/w

% w/w

% w/v

21. The molal depression constant depends upon

∆H

Nature of solvent

Nature of solute

Vapour pressure of solution

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

Molality

Formality

Molarity

Mole fraction

23. The liquid pair which is not completely miscible

CH₃OH and water

Phenol and water

Benzene and toluene

Alcohol and water

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

Solute non-electrolyte

Dilute solution

All

Volatile solute

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

Ideal

Amorphous

Super saturated

Azeotropic mixture

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26. Which one will from an ideal solution?

C₂H₅OH and H₂O

C₆H₆ and CCI₄

CHCI₃ and CH₃COOCH₃

H₂O and HBr.

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

Both b & c

Will be an ideal solution

Will be non-ideal solution

Will show deviations from Raoults law

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

Dilute solution

Saturated solution

Unsaturated solution

Super saturated solution

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

Osmotic pressure

Depression of freezing point

Elevation of boiling point

Density

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

Urea

Glucose

KCl

CaCl₂

31. The molal depression constant depends upon

∆H solution

Nature of solute

Vapour pressure of solution

Nature of solvent

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

Osmotic pressure

Lowering of vapour pressure

Elevation of polling point

Freezing point

33. Units of molarity are

Mol/lit

Kg/lit

None

Gm/lit

34. Which has the minimum freezing point?

One molal KCl Solution

One Molal NaCl

One molal urea solution

One molal CaCI₂

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

Solution

Radical

Compound

Ion

36. Isotonic solutions have same

None of these

Normality

Molar concentration

Molality

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

Solvation

Solution

Solute

Solvent

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

It is saturated

It is metastable

It show positive deviation from Rault’s law

It shows negative deviation from Rault’s law

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

1 mole solution

None of these

1 normal solution

1 Molar solution

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

Unsaturated

Supersaturated

None of these

Saturated

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

Temperature

Amount of liquid

Nature of non ovolatile

Surface area of the container

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

H₂O and HBr.

CHCI₃ and CH₃ 100 CH₃

C₂H₅OH and H₂O

C₆H₆ and CCI₄

43. In partially miscible liquids the two layers are

Normal solution of each other

Saturated solution of each other

No layer formation takes place

Unsaturated solution of each other

44. Which of the following is a colligative property?

Melting point

Sublimation temperature

Freezing point

Osmotic pressure

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

The mole fraction of Solute

More fraction of solvent

Molecular weight of the solvent

Pressure of the atmosphere

46. The concentration units independent of temperature would be

Normality

Mass-volume percent

Molarity

Molality

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

Non-ideal solution

Zeotropic solution

Ideal solution

Azeotropic solution

48. The lowest vapour pressure is exerted by

Water

Methanol

Chloroform

Ethanol

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

Electrolysis

Electrophoresis

Osmosis

Cataphoresis

50. 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.)

0.033 N

0.045 N

0.066 N

0.090 N

Page 3 of 3

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

Molality

Mole fraction of Solvent

Mole fraction of solute

Molarity

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

Non-electrolyte solute

Non-volatile solute

Dilute solution

All of these

53. 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 formed is an ideal solution

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

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

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

Molality

Mole fraction

Normality

Molarity

55. The solution which distils over with change in composition

Non-ideal solution

Zeotropic solution

Azeotropic solution

Ideal solution

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

Reducing specific heat

Lowering in b.pt.

Lowering in freezing pt

Reducing viscosity

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

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

Change in temperature of solutions takes place

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

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

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

Complexes

Coordinate compounds

Double salts

Hydrates

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

Dilute

Concentrated

Saturated solution

All of these

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

Osmatic pressure

Lowering of vapour pressure

Freezing point

Elevation of boiling point

61. Solution of Na2SO4 will be

More acidic

Basic

Neutral

Acidic

62. A solution of two components is called

Original solution

Dilute solution

Standard solution

Binary solution

63. Which is not a colligative property?

Depression of freezing point

Lowering of vapour pressure

Osmotic pressure

Elevation of boiling point

64. Saturated solution of NaCl on heating becomes

Unsaturated

Remains saturated

None

Super saturated

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Maan AliLast Updated: April 19, 2025

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ECAT Chemistry Solutions Online Test

Chemistry Solutions MCQS Online Test

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