Mixture and Solution

aowenelearning — 2025-10-24 08:25:15 UTC

Section A: Concepts of Mixtures

A mixture is formed when __________.
A. Two or more substances are chemically joined
B. Two or more substances are combined without chemical change
C. One substance changes into another
D. Heat is applied to form a new substance
Which of the following is a mixture?
A. Water
B. Carbon dioxide
C. Air
D. Salt
Which of the following is NOT a mixture?
A. Seawater
B. Lemon juice
C. Iron
D. Salad
The main characteristic of a mixture is that __________.
A. It forms a new substance
B. Its components can be separated easily
C. It has a fixed composition
D. It cannot be separated
Which of the following is a homogeneous mixture?
A. Oil and water
B. Salt and water
C. Sand and iron filings
D. Flour and rice
Which of these is a heterogeneous mixture?
A. Vinegar
B. Air
C. Salad
D. Sugar solution
The air we breathe is a mixture of __________.
A. Hydrogen and oxygen
B. Oxygen and carbon dioxide only
C. Nitrogen, oxygen, and other gases
D. Carbon dioxide and nitrogen only
The components of a mixture retain their __________.
A. Chemical properties
B. Physical properties
C. Molecular structure
D. None of these
Mixtures can be separated by __________ means.
A. Chemical
B. Physical
C. Electrical
D. Biological
Which of the following is a solid-solid mixture?
A. Salt and water
B. Sand and iron filings
C. Sugar and milk
D. Oil and water

Section B: Separation of Mixtures

The method used to separate sand from water is __________.
A. Filtration
B. Evaporation
C. Condensation
D. Distillation
To separate salt from salt solution, we use __________.
A. Filtration
B. Evaporation
C. Sieving
D. Decantation
Which method is used to separate a mixture of iron filings and sand?
A. Filtration
B. Magnetic separation
C. Decantation
D. Evaporation
Which process involves changing a liquid into vapour?
A. Condensation
B. Evaporation
C. Freezing
D. Melting
A mixture of oil and water can be separated by __________.
A. Filtration
B. Decantation
C. Sieving
D. Evaporation
The method of separating a mixture by passing it through a filter paper is called __________.
A. Decantation
B. Filtration
C. Evaporation
D. Sedimentation
Which separation method is used for grains of different sizes?
A. Filtration
B. Sieving
C. Winnowing
D. Magnetic separation
Which of the following separation techniques involves wind or air?
A. Sieving
B. Winnowing
C. Filtration
D. Evaporation
When a mixture of sand and water is allowed to settle, the process is called __________.
A. Filtration
B. Sedimentation
C. Decantation
D. Evaporation
Which process involves heating a liquid to obtain vapour and then cooling it?
A. Evaporation
B. Distillation
C. Filtration
D. Sedimentation

Section C: Solutions

A solution is a __________ mixture.
A. Homogeneous
B. Heterogeneous
C. Chemical
D. Complex
The substance that dissolves in another to form a solution is called the __________.
A. Solvent
B. Solute
C. Mixture
D. Residue
The substance that dissolves the solute is called the __________.
A. Solvent
B. Solution
C. Mixture
D. Residue
In salt solution, salt is the __________.
A. Solvent
B. Solute
C. Solution
D. Mixture
In salt solution, water is the __________.
A. Solute
B. Solvent
C. Mixture
D. Solid
A solution that contains a large amount of solute is called a __________ solution.
A. Dilute
B. Concentrated
C. Saturated
D. Weak
A solution that cannot dissolve any more solute is called __________.
A. Concentrated
B. Dilute
C. Saturated
D. Homogeneous
When no solute is visible in a solution, it means the solute has __________.
A. Evaporated
B. Dissolved completely
C. Settled down
D. Reacted
The process by which a solute dissolves in a solvent is called __________.
A. Sedimentation
B. Solution formation
C. Dissolving
D. Mixing
Which of the following will dissolve most substances?
A. Alcohol
B. Oil
C. Water
D. Mercury

Section D: Factors Affecting Solubility

Which factor increases the rate at which a solute dissolves in a solvent?
A. Decreasing temperature
B. Stirring
C. Adding more solute
D. Stopping movement
Increasing the temperature generally makes solids dissolve __________.
A. Faster
B. Slower
C. Not at all
D. Equally
The solubility of gases in liquids __________ when temperature increases.
A. Increases
B. Decreases
C. Remains constant
D. Becomes zero
Stirring helps a solute dissolve faster by __________.
A. Decreasing solubility
B. Increasing contact between solute and solvent
C. Cooling the solution
D. Making solute settle
Crushing a solute into smaller pieces helps it dissolve faster because it __________.
A. Reduces surface area
B. Increases surface area
C. Changes it chemically
D. Reduces solubility
When you stir salt in water, it dissolves faster because of __________.
A. Cooling
B. Movement of water particles
C. Chemical reaction
D. Evaporation
Which factor does NOT affect solubility?
A. Temperature
B. Stirring
C. Colour
D. Particle size
A saturated solution can become unsaturated when __________.
A. The temperature is increased
B. More solute is added
C. The solvent is removed
D. The mixture is cooled
Solubility is defined as the __________.
A. Amount of solvent in a solution
B. Amount of solute that can dissolve in a solvent
C. Volume of the solvent
D. Weight of the solution
The temperature at which a solution becomes saturated is called the __________.
A. Solvent point
B. Boiling point
C. Saturation point
D. Freezing point

Section E: Applications and Examples

Which of these is an example of a gaseous solution?
A. Lemon juice
B. Air
C. Milk
D. Seawater
Which of these is an example of a liquid-liquid solution?
A. Vinegar
B. Air
C. Brass
D. Ink and water
Brass is a mixture of __________.
A. Copper and tin
B. Copper and zinc
C. Iron and carbon
D. Lead and silver
Which of the following mixtures is useful in everyday life?
A. Muddy water
B. Seawater
C. Air
D. All of the above
Salt and sugar can be separated by __________.
A. Filtration
B. Evaporation and crystallization
C. Magnetism
D. Sieving
Ink is a mixture of __________.
A. Water and carbon dioxide
B. Dyes and water
C. Alcohol and air
D. Oil and pigments
Which of the following mixtures can be separated by filtration?
A. Salt solution
B. Sand and water
C. Air and dust
D. Alcohol and water
The clear liquid that passes through the filter paper is called the __________.
A. Residue
B. Filtrate
C. Solute
D. Solvent
The solid material left on the filter paper is called the __________.
A. Solute
B. Filtrate
C. Residue
D. Solution
Which of these processes is involved in the water cycle and in separating mixtures?
A. Melting
B. Distillation
C. Condensation
D. Both B and C

Obeng,Lordina,Ekow,Mabel and Mohiasin.

2025-10-24 10:05:16 UTC

Section A

1.B.Two or more substances are combined without chemical change.

2.A.water D.salt

3.C.Iron.

4.A.It forms a new substance.

5.B.Salt and water.

6.C.Salad.

7.A.Hydrogen and oxygen.

8.B.Physical properties.

9.A.Chemical.

10.B.Sand and iron flillings

Section B

11.A.Filtration.

12.B.Evaporation

13.B.Magnetic separation

14.B.Evaporation.

15.B.Decantation.

16.B.Filtration.

17.C.Winnowing.

18.A.Sieving.

19.C.Decantation.

20. D.Sedimentation.

Section C

21.A.Homogeneous.

22.B.Solvent.

23.B.Solution.

24.A.Solvent

25.A.Solute

26.A.Dilute

27.C.Saturated.

28.B.Dissolved completely.

29.D.Solution formation.

30.C.Water.

Section D

31.A.Decreasing temperature.

32.D.Equally.

33.A.Increases.

34.D.Making solute settle.

35.C.Change it chemical.

36.B.Movement of particles.

37.D.Particle size.

38.C.The solvent is removed.

39.B.Amount of solute that can dissolve in a solvent.

40.A.Solvent point.

Section E

41.B.Air

42.Ink and water.

43.C.Iron and carbon.

44.C.Air

45.D.Sieving.

46.B.Dyes and water.

47.B.Sand and water.

48.B.Filtrate.

49.C.Residue.

50.D.Both B and C.

Solution and mixture by Ayi Owen Elearning

Mixture and Solution

Obeng,Lordina,Ekow,Mabel and Mohiasin.