Y8 Chemistry PPE Revision

Question 1

Give 6 properties of metals:

Answer 1

Heat Conductor, Electrical Conductor, Ductile, Solid, Opaque, Posses Metallic luster.

Question 2

Give 6 properties of non-metals

Answer 2

Dull, Brittle, Poor thermal conductors, poor electricity conductors, gains electrons easier

Question 3

What is an Ore?

Answer 3

A natural occurring solid material from which a metal or valuable can be extracted.

Question 4

How are metals at the top of the reactivity series extracted from their ores?

Answer 4

by electrolytic reduction

Question 5

How are metals in the middle of the reactivity series extracted from their ore?

Answer 5

Heating the ore with Carbon

Question 6

What are the Metals in order of their reactivity?

Answer 6

Potassium, sodium, Calcium, Magnesium, Aluminium, Zinc, Iron, Tin, Lead, Copper, Silver, Gold, platinum

Question 7

Give an example of a physical change

Answer 7

Crushing a can

Question 8

What are 3 signs that a chemical reaction has occurred

Answer 8

Bubbles, Change in temperature, Change in colour.

Question 9

What is the difference between a endothermic reaction and a exothermic reaction.

Answer 9

Endothermic reaction occurs when energy is observed from surroundings in the form of heat and a Exothermic reaction is when energy is released

Question 10

What is an oxidation reaction? Give an example:

Answer 10

The addition of oxygen to a substance. Rusting

Question 11

What is a thermal decomposition reaction?

Answer 11

Chemical combination caused by heat.

Question 12

Give an example of thermal decomposition

Answer 12

Calcium Carbonate = calcium oxide + Carbon Dioxide.

Question 13

What is Combustion?

Answer 13

Rapid chemical combination of a substance with oxygen, involving heat and light.

Question 14

Give an example of Combustion.

Answer 14

Burning wood.

Question 15

Explain what happens in a displacement reaction.

Answer 15

A more reactive element displaces a less reactive element from its compound.

Question 16

Give an example of a displacement reaction.

Answer 16

Reaction of Iron Nails with Copper Sulphate Solution.

Question 17

What colour does a strong acid turn Universal Indicator?

Answer 17

Red

Question 18

What PH is a Strong acid

Answer 18

1 - 2

Question 19

Give an example of an acid.

Answer 19

Hydrochloric Acid

Question 20

What colour is a strong Alkali turn universal Indicator

Answer 20

Purple

Question 21

What PH is a strong Alkali?

Answer 21

13 - 14

Question 22

Give an example of an Alkali.

Answer 22

Fairy Liquid

Question 23

Sodium Hydroxide + Hydrochloic Acid = ??

Answer 23

Sodium Cloride.

Question 24

Calcium Carbonate + Sulphuric acid = ??

Answer 24

Calcium Sulphate.

Question 25

Potassium Hydroxide + Nitric acid = ??

Answer 25

Potassium Nitrate.

Question 26

Lithium + Oxygen = ??

Answer 26

Lithium Oxide.

Question 27

Zinc + Nitric acid = ??

Answer 27

Zinc nitrate.

Question 28

Magnesium oxide + Sulphuric acid = ??

Answer 28

Magnesium Sulphate.

Question 29

Copper Carbonate + hydrochloric acid = ??

Answer 29

Copper Chloride.

Question 30

How are sedimentary rock formed?

Answer 30

By sedimentation, compaction and cementation

Question 31

How are igneous rocks formed?

Answer 31

By the cooling of magma

Question 32

Give properties of Sedimentary rock

Answer 32

Large Crystals, Contains grains, layer and can contain fossils.

Question 33

Give properties of Igneous rock

Answer 33

Small Crystals and no fossils can be found.

Question 34

How are metamorphic rocks formed?

Answer 34

by heat and pressure

Question 35

How is CO2 removed from the air?

Answer 35

Plants breathe it in from Photosynthesis

Question 36

Give some properties of Metamorphic

Answer 36

Has layers and can not contain fossils.

Question 37

How is CO2 added to the air?

Answer 37

Animals breathe it out.

Question 38

How do humans contribute to climate change?

Answer 38

Deforestation

Question 39

Describe Biological weathering

Answer 39

From plants and animals. E.G rabbits berrying a rock or weeds growing through cracks.

Question 40

Describe Chemical weathering

Answer 40

From Chemicals E.G rainwater is acidic which reacts with rock and corrodes rock.

Question 41

Describe Physical Weathering

Answer 41

Physical processes E.G Change in temperature and effects of wind, rain and waves