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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. Osmotic pressure of a solution increases by

Increasing the volume

Decreasing the temperature

None of these

Increasing the number of molecules of the solute

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

Ion

Compound

Solution

Radical

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

Dilute solution

Unsaturated solution

Saturated solution

Super saturated solution

4. Saturated solution of NaCl on heating becomes

Remains saturated

Super saturated

Unsaturated

None

5. Isotonic solutions have same

Normality

Molality

None of these

Molar concentration

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

Lowering of vapour pressure

Osmotic pressure

Elevation of polling point

Freezing point

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

Phase

Solvent

Solute

Solution

8. 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 saturated

It show positive deviation from Rault’s law

It is metastable

9. The molal depression constant depends upon

Nature of solvent

∆H

Nature of solute

Vapour pressure of solution

10. The osmotic pressure of solution increases if

Number of solute molecules are increased

Temperature is decreased

Solution constant is increased

Volume is increased

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

CaCl₂

Glucose

KCl

Urea

12. The solution which distils over with change in composition

Zeotropic solution

Ideal solution

Azeotropic solution

Non-ideal solution

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

Unsaturated

Supersaturated

Saturated

None of these

14. Which is not a colligative property?

Depression of freezing point

Lowering of vapour pressure

Elevation of boiling point

Osmotic pressure

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

Molarity

Molality

Mole fraction

Formality

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

Acetone – chloroform

Benzene – methanol

Water – hydrochloric acid

Water – nitric acid

17. The liquid pair which is not completely miscible

CH₃OH and water

Alcohol and water

Phenol and water

Benzene and toluene

18. Solution of Na2SO4 will be

Basic

Acidic

More acidic

Neutral

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

Reducing viscosity

Reducing specific heat

Lowering in freezing point

Lowering in B.P

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

All of these

Concentrated

Saturated solution

Dilute

21. 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 is non-ideal, showing +ve deviation from Raoult’s Law

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

The solution formed is an ideal solution

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

Non-ideal solution

Azeotropic solution

Ideal solution

Zeotropic solution

23. The process of osmosis was first discovered by

Pfeffer

Dutrochet

Nollet

Traube

24. 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

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

Osmotic pressure

Depression of freezing point

Density

Elevation of boiling point

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

Solution

Solvation

Solvent

Solute

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

1 normal solution

1 mole solution

1 Molar solution

None of these

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

Mole fraction

Molality

Molarity

All

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

Equal to the total volume of the components

Slightly more than the total volume of the components

None of these

Slightly less than the total volume of the components

30. 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).

2.40 eq

1.20 eq

0.600 eq

3.60 eq

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

200 cm³

900 cmn³

1.8 dm³

1 dm³

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

The relative lowering of vapour pressure is equal to mole fraction 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

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

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

Opals

Paints

Dust particles in smoke

Fog

34. In partially miscible liquids the two layers are

Normal solution of each other

No layer formation takes place

Unsaturated solution of each other

Saturated solution of each other

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

Freezing point

Elevation of boiling point

Osmatic pressure

Lowering of vapour pressure

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

Solute non-electrolyte

All

Dilute solution

Volatile solute

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

Coordinate compounds

Hydrates

Double salts

Complexes

38. The lowest vapour pressure is exerted by

Water

Chloroform

Ethanol

Methanol

39. Maximum F.P falls in

Camphor

Naphthalene

Water

Benzene

40. 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

0.090 N

0.045 N

0.066 N

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

Modification of refractive index

Elevation of boiling point

Depression in freezing pint

Osmotic pressure

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

CHCI₃ and CH₃ 100 CH₃

C₆H₆ and CCI₄

H₂O and HBr.

C₂H₅OH and H₂O

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

Molality

Mole fraction of solute

Molarity

Mole fraction of Solvent

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

Will be non-ideal solution

Will show deviations from Raoults law

Will be an ideal solution

Both b & c

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

Temperature

Amount of liquid

Surface area of the container

Nature of non ovolatile

46. 10ml of alcohol dissolve in 90ml of water unit of concentration used is

% v/v

% w/v

% w/w

% v/w

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

Cataphoresis

Electrolysis

Electrophoresis

Osmosis

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

Phase

Solute

Solvent

Ion

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

Molarity

Normality

Molality

Mole fraction

50. Which inorganic precipitate acts as semipermeable membrane?

Calcium sulphate

Nickel phosphate

Barium oxalate

Copper ferrocyanide

Page 3 of 3

51. Units of molarity are

Kg/lit

None

Gm/lit

Mol/lit

52. 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 A to that of B take place

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

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

Change in temperature of solutions takes place

53. Which one will from an ideal solution?

CHCI₃ and CH₃COOCH₃

C₆H₆ and CCI₄

C₂H₅OH and H₂O

H₂O and HBr.

54. Depression in freezing point is directly to

Molarity of solution

Molality of solvent

Molarity of solvent

Molality of solution

55. The molal depression constant depends upon

Nature of solute

∆H solution

Vapour pressure of solution

Nature of solvent

56. A solution of two components is called

Dilute solution

Original solution

Binary solution

Standard solution

57. Beckmann’s apparatus is used to measure

B.P elevation

Depression in F.P

Temperature

Pressure

58. 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

Lowering in b.pt.

Reducing viscosity

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

Non-electrolyte solute

Dilute solution

Non-volatile solute

All of these

60. The concentration units independent of temperature would be

Molarity

Molality

Normality

Mass-volume percent

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

Molecular weight of the solvent

More fraction of solvent

The mole fraction of Solute

Pressure of the atmosphere

62. Which has the minimum freezing point?

One Molal NaCl

One molal urea solution

One molal KCl Solution

One molal CaCI₂

63. Which of the following is a colligative property?

Sublimation temperature

Osmotic pressure

Melting point

Freezing point

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

Azeotropic mixture

Ideal

Amorphous

Super saturated

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Maan AliLast Updated: April 19, 2025

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ECAT Chemistry Solutions Online Test

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ECAT Chemistry Solutions Chapter Online Test

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