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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

Page 1 of 3

Chemistry

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

Will be non-ideal solution

Both b & c

Will show deviations from Raoults law

Will be an ideal solution

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

Molality

Normality

Mole fraction

Molarity

3. 10ml of alcohol dissolve in 90ml of water unit of concentration used is

% v/v

% v/w

% w/w

% w/v

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

Dilute

Concentrated

Saturated solution

All of these

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

Saturated solution

Super saturated solution

Dilute solution

Unsaturated solution

6. 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

Change in temperature of solutions takes place

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

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

Nature of non ovolatile

Amount of liquid

Surface area of the container

Temperature

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

1 dm³

1.8 dm³

900 cmn³

200 cm³

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

Phase

Solute

Solvent

Ion

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

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

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

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

Depression of freezing point

Density

Osmotic pressure

Elevation of boiling point

12. 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

3.60 eq

0.600 eq

2.40 eq

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

Coordinate compounds

Hydrates

Double salts

Complexes

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

Non-ideal solution

Zeotropic solution

Ideal solution

Azeotropic solution

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

Electrophoresis

Cataphoresis

Osmosis

Electrolysis

16. The liquid pair which is not completely miscible

CH₃OH and water

Benzene and toluene

Alcohol and water

Phenol and water

17. Which one will from an ideal solution?

H₂O and HBr.

C₆H₆ and CCI₄

CHCI₃ and CH₃COOCH₃

C₂H₅OH and H₂O

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

1 normal solution

1 Molar solution

None of these

1 mole solution

19. The solution which distils over with change in composition

Ideal solution

Non-ideal solution

Zeotropic solution

Azeotropic solution

20. Osmotic pressure of a solution increases by

Increasing the number of molecules of the solute

None of these

Decreasing the temperature

Increasing the volume

21. Which has the minimum freezing point?

One molal KCl Solution

One Molal NaCl

One molal CaCI₂

One molal urea solution

22. Solution of Na2SO4 will be

Acidic

Neutral

Basic

More acidic

23. The molal depression constant depends upon

∆H solution

Nature of solvent

Nature of solute

Vapour pressure of solution

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

Solution

Solute

Solvent

Solvation

25. Isotonic solutions have same

Molar concentration

None of these

Normality

Molality

Page 2 of 3

26. Which of the following is a colligative property?

Melting point

Osmotic pressure

Sublimation temperature

Freezing point

27. 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

28. The osmotic pressure of solution increases if

Solution constant is increased

Temperature is decreased

Volume is increased

Number of solute molecules are increased

29. 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

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

Lowering in freezing point

Reducing viscosity

Lowering in B.P

Reducing specific heat

31. Which inorganic precipitate acts as semipermeable membrane?

Calcium sulphate

Copper ferrocyanide

Nickel phosphate

Barium oxalate

32. Depression in freezing point is directly to

Molality of solvent

Molarity of solvent

Molarity of solution

Molality of solution

33. 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 show positive deviation from Rault’s law

It is saturated

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

Azeotropic mixture

Amorphous

Ideal

Super saturated

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

Slightly less than the total volume of the components

Equal to the total volume of the components

None of these

Slightly more than the total volume of the components

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

Opals

Dust particles in smoke

Fog

Paints

37. The molal depression constant depends upon

∆H

Nature of solvent

Vapour pressure of solution

Nature of solute

38. 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

39. 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.)

0.090 N

0.033 N

0.045 N

0.066 N

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

Mole fraction of solute

Molality

Molarity

Mole fraction of Solvent

41. Beckmann’s apparatus is used to measure

B.P elevation

Depression in F.P

Pressure

Temperature

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

C₂H₅OH and H₂O

H₂O and HBr.

CHCI₃ and CH₃ 100 CH₃

C₆H₆ and CCI₄

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

None of these

Supersaturated

Saturated

Unsaturated

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

All of these

Non-electrolyte solute

Dilute solution

Non-volatile solute

45. Which is not a colligative property?

Elevation of boiling point

Osmotic pressure

Depression of freezing point

Lowering of vapour pressure

46. The lowest vapour pressure is exerted by

Methanol

Chloroform

Ethanol

Water

47. The concentration units independent of temperature would be

Mass-volume percent

Molality

Normality

Molarity

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

CaCl₂

Glucose

Urea

KCl

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

Modification of refractive index

Depression in freezing pint

Elevation of boiling point

Osmotic pressure

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

Lowering of vapour pressure

Elevation of polling point

Freezing point

Osmotic pressure

Page 3 of 3

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

Molarity

Mole fraction

Molality

Formality

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

Radical

Solution

Compound

Ion

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

Dilute solution

Solute non-electrolyte

Volatile solute

All

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

Freezing point

Lowering of vapour pressure

Elevation of boiling point

Osmatic pressure

55. Units of molarity are

Gm/lit

None

Mol/lit

Kg/lit

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

Water – hydrochloric acid

Benzene – methanol

Acetone – chloroform

Water – nitric acid

57. Saturated solution of NaCl on heating becomes

None

Super saturated

Remains saturated

Unsaturated

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

Lowering in b.pt.

Reducing viscosity

Lowering in freezing pt

Reducing specific heat

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

Solute

Phase

Solution

Solvent

60. The process of osmosis was first discovered by

Traube

Dutrochet

Nollet

Pfeffer

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

All

Molality

Molarity

Mole fraction

62. 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

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

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

63. A solution of two components is called

Standard solution

Original solution

Binary solution

Dilute solution

64. Maximum F.P falls in

Water

Naphthalene

Camphor

Benzene

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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

Chemistry

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Chemistry Solutions MCQS Online Test

ECAT Chemistry Solutions Chapter Online Test

ECAT Chemistry Solutions Test

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