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7 Chem revision - mixtures

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

A solution that has water as its solvent

a)

aqueous solution

b)

saturated solution

c)

insoluble solution

d)

soluble solution

2.

A solution that has as much substance as possible dissolved in it

a)

aqueous solution

b)

saturated solution

c)

insoluble solution

d)

soluble solution

3.

A method of separation by spinning the mixture very fast

a)

Centrifugation

b)

chromatography

c)

crystallisation

d)

filtration

4.

A method of separation by making it move over or through another substance that stays still

a)

Centrifugation

b)

chromatography

c)

crystallisation

d)

filtration

5.

A method of separation by using a barrier with small holes

a)

Centrifugation

b)

chromatography

c)

crystallisation

d)

filtration

6.

The formation of crystals as a dissolved substance solidifies

a)

Centrifugation

b)

chromatography

c)

crystallisation

d)

filtration

7.

A method of separation by pouring a liquid off the top

a)

decanting

b)

desalinisation

c)

distilling

d)

dissolving

8.

A method of separation using evaporation and condensing

a)

decanting

b)

desalinisation

c)

distilling

d)

dissolving

9.

Breaking up into tiny particles that are smaller than the eye can see

a)

decanting

b)

desalinisation

c)

distilling

d)

dissolving

10.

A method useful for separating some metals from non-metals

a)

magnetic separation

b)

gravity separation

c)

filtration

d)

evaporation

11.

A method useful for separating heavier particles from a mixture

a)

magnetic separation

b)

gravity separation

c)

filtration

d)

evaporation

12.

The change of a liquid to a gas

a)

magnetic separation

b)

gravity separation

c)

filtration

d)

evaporation

13.

A substance that dissolves in another to make a solution

a)

solute

b)

solution

c)

solvent

d)

suspension

14.

when a substance dissolves in another, forming a clear mixture

a)

solute

b)

solution

c)

solvent

d)

suspension

15.

A substance that dissolves another substance

a)

solute

b)

solution

c)

solvent

d)

suspension

16.

A mixture which is not dissolved, but separates if left to stand

a)

solute

b)

solution

c)

solvent

d)

suspension

17.

How to make large crystals?

a)

Heat a concentrated solution up quickly

b)

Heat a concentrated solution up slowly

c)

Cool a concentrated solution down quickly

d)

Cool a concentrated solution down slowly

18.

How much KNO3 is dissolved at 50° C?

a)

80 g/100g

b)

50 g/100g

c)

60 g/100g

d)

240 g/100g

19.

How much CuSO4.5H2O is dissolved at 80° C?

a)

100 g/100g

b)

50 g/100g

c)

60 g/100g

d)

240 g/100g

20.

Which substance (CuSO4.5H2O or KNO3) is more soluble at 70° C?

a)

CuSO4.5H2O

b)

KNO3

c)

They are the same

d)

Neither is soluble