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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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Chemistry

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

Lowering in freezing pt

Reducing viscosity

Lowering in b.pt.

Reducing specific heat

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

Volatile solute

Solute non-electrolyte

Dilute solution

All

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

Super saturated

Azeotropic mixture

Amorphous

Ideal

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

C₂H₅OH and H₂O

C₆H₆ and CCI₄

H₂O and HBr.

CHCI₃ and CH₃ 100 CH₃

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

Radical

Compound

Ion

Solution

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

It shows negative deviation from Rault’s law

It show positive deviation from Rault’s law

It is metastable

It is saturated

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

Coordinate compounds

Complexes

Double salts

Hydrates

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

Both b & c

Will be non-ideal solution

Will be an ideal solution

Will show deviations from Raoults law

9. The liquid pair which is not completely miscible

Benzene and toluene

Phenol and water

Alcohol and water

CH₃OH and water

10. 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

11. Beckmann’s apparatus is used to measure

Temperature

B.P elevation

Pressure

Depression in F.P

12. 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

13. The process of osmosis was first discovered by

Nollet

Dutrochet

Traube

Pfeffer

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

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

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

15. The lowest vapour pressure is exerted by

Ethanol

Methanol

Water

Chloroform

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

Non-ideal solution

Zeotropic solution

Azeotropic solution

Ideal solution

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

Lowering in B.P

Reducing viscosity

Lowering in freezing point

Reducing specific heat

18. Maximum F.P falls in

Naphthalene

Camphor

Benzene

Water

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

Dilute solution

Unsaturated solution

Super saturated solution

Saturated solution

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

Elevation of boiling point

Lowering of vapour pressure

Osmatic pressure

Freezing point

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

None of these

1 Molar solution

1 normal solution

1 mole solution

22. 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

23. The solution which distils over with change in composition

Ideal solution

Non-ideal solution

Azeotropic solution

Zeotropic solution

24. 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?

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

The solution formed is an ideal solution

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

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

Solvation

Solution

Solute

Solvent

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26. Which one will from an ideal solution?

H₂O and HBr.

C₆H₆ and CCI₄

CHCI₃ and CH₃COOCH₃

C₂H₅OH and H₂O

27. 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

28. Which is not a colligative property?

Depression of freezing point

Osmotic pressure

Elevation of boiling point

Lowering of vapour pressure

29. The osmotic pressure of solution increases if

Temperature is decreased

Volume is increased

Number of solute molecules are increased

Solution constant is increased

30. The molal depression constant depends upon

Nature of solvent

∆H

Nature of solute

Vapour pressure of solution

31. Units of molarity are

Gm/lit

Kg/lit

Mol/lit

None

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

Elevation of boiling point

Osmotic pressure

Depression of freezing point

Density

33. Osmotic pressure of a solution increases by

Increasing the volume

None of these

Increasing the number of molecules of the solute

Decreasing the temperature

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

Solvent

Solute

Phase

Solution

35. 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

0.066 N

0.045 N

36. Which has the minimum freezing point?

One molal KCl Solution

One molal urea solution

One molal CaCI₂

One Molal NaCl

37. 10ml of alcohol dissolve in 90ml of water unit of concentration used is

% w/w

% v/w

% w/v

% v/v

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

Saturated

Supersaturated

Unsaturated

None of these

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

All of these

Saturated solution

Dilute

Concentrated

40. 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

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

Amount of liquid

Temperature

Surface area of the container

Nature of non ovolatile

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

Freezing point

Elevation of polling point

Lowering of vapour pressure

Osmotic pressure

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

Solute

Ion

Phase

Solvent

44. Depression in freezing point is directly to

Molality of solution

Molality of solvent

Molarity of solution

Molarity of solvent

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

CaCl₂

Glucose

KCl

Urea

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

Non-volatile solute

All of these

Non-electrolyte solute

Dilute solution

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

Molarity

Formality

Molality

Mole fraction

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

Dust particles in smoke

Opals

Fog

Paints

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 liquid pairs shows a positive deviation from Raoult’s law?

Water – hydrochloric acid

Benzene – methanol

Acetone – chloroform

Water – nitric acid

Page 3 of 3

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

Molarity

Molality

Mole fraction of Solvent

Mole fraction of solute

52. Solution of Na2SO4 will be

More acidic

Basic

Acidic

Neutral

53. The concentration units independent of temperature would be

Normality

Mass-volume percent

Molarity

Molality

54. The molal depression constant depends upon

∆H solution

Nature of solvent

Nature of solute

Vapour pressure of solution

55. Saturated solution of NaCl on heating becomes

Unsaturated

Super saturated

None

Remains saturated

56. Which of the following is a colligative property?

Freezing point

Melting point

Sublimation temperature

Osmotic pressure

57. 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

0.600 eq

3.60 eq

1.20 eq

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

Electrophoresis

Electrolysis

Cataphoresis

Osmosis

59. Which inorganic precipitate acts as semipermeable membrane?

Nickel phosphate

Barium oxalate

Calcium sulphate

Copper ferrocyanide

60. A solution of two components is called

Binary solution

Original solution

Standard solution

Dilute solution

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

Molarity

Molality

All

Mole fraction

62. Isotonic solutions have same

None of these

Normality

Molar concentration

Molality

63. In partially miscible liquids the two layers are

Saturated solution of each other

Unsaturated solution of each other

Normal solution of each other

No layer formation takes place

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

Mole fraction

Molality

Molarity

Normality

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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

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Chemistry

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Chemistry Solutions MCQS Online Test

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