Metals And Their Uses

Question 1

What does the metal extraction method depend on?

Answer 1

The metals place in the reactivity series

Question 2

What is one method by which metals can be extracted?

Answer 2

Displacement by using a more reactive

Question 3

How can metals that are less reactive than carbon be extracted?

Answer 3

They can be extracted from their oxides by heating with carbon

Question 4

What is a reduction reaction?

Answer 4

They take place as carbon removes oxygen from the oxide to produce the pre metal. This method is used commercially if possible

Question 5

Which metals are below carbon in the reactivity series?

Answer 5

Zinc, iron, tin, lead, copper

Question 6

Which metals are naturally occurring?

Answer 6

Gold, silver, platinum

Question 7

How is gold extracted?

Answer 7

Physical methods as it is naturally occurring

Question 8

What is a blast furnace?

Answer 8

The huge reaction vessels used in industry to extract iron from its ore

Question 9

Which compound is reduced to make iron?

Answer 9

Iron oxide

Question 10

What is iron from a blast furnace like?

Answer 10

Too brittle for many uses so can only be used really as cast iron

Question 11

What is the iron like after removing all the impurities and carbon?

Answer 11

Pure iron but is too soft for many uses

Question 12

Why is pure iron used in alloys such as steels?

Answer 12

The steel alloys are much harder than iron and can be used for more things

Question 13

What are low-carbon steels like?

Answer 13

Easily shaped

Question 14

What are high-carbon steels like?

Answer 14

Hard

Question 15

What are special about stainless steels?

Answer 15

They contain lather quantities of other metals and they resist corrosion

Question 16

What is useful about aluminium and titanium?

Answer 16

They have low densities compared to other strong metals and resist corrosion

Question 17

Can aluminium be reduced by carbon?

Answer 17

No as it is more reactive than carbon and so its oxide cannot be reduced

Question 18

How does aluminium have to be extracted?

Answer 18

Electrolysis of molten aluminium oxide

Question 19

What is bad about electrolysis?

Answer 19

The process requires high temperature and a lot of electricity making extraction of things such as aluminium is expensive

Question 20

What is pure aluminium like compared to alloys?

Answer 20

Pure aluminium is not very strong but aluminium alloys are stronger and harder

Question 21

Can titanium be made by extracting them from their oxides with carbon?

Answer 21

No Titanium oxide can be reduced by carbon but the metal reacts with carbon making it brittle

Question 22

How is titanium extracted from its ore?

Answer 22

By a process that involves several stages and large amounts of energy, making this process expensive

Question 23

Why are titanium and aluminium resistant to corrosion?

Answer 23

They have a thin layer of their oxides on the surface

Question 24

What is aluminium used as?

Answer 24

Aircraft, trains, saucepans, cooking foil

Question 25

What is titanium used as?

Answer 25

Aircraft, hip joints, pipes in nuclear power stations

Question 26

Why is titanium useful for making aircraft engines?

Answer 26

Strong, resistant to corrosion, low density

Question 27

How can copper be extracted from copper rich ores?

Answer 27

Smelting-heating the ore strongly in a furnace

Question 28

What does smelting copper produce?

Answer 28

Impure copper

Question 29

How is impure copper purified?

Answer 29

Electrolysis

Question 30

What is bad abou the process of smelting and purifying copper?

Answer 30

Requires huge amounts of electricity and heating

Question 31

What is photomining?

Answer 31

Uses plants to absorb copper compounds from the ground the plants are burned and produce ash from which copper can be extracted

Question 32

How are scientists trying to find methods of extractions copper?

Answer 32

Developing new ways of extracting copper from low grade ores which will have less environmental impacts

Question 33

What is bioleaching?

Answer 33

Using bacteria to produce solutions containing copper compounds

Question 34

How can copper be obtained by displacement?

Answer 34

Solutions of copper compounds can be reacted with a metal that is more reactive than copper such as scrap iron

Question 35

Can copper be extracted by electrolysis?

Answer 35

Yes

Question 36

What three ways can Be used to produce copper metal from its compounds?

Answer 36

Smelting Electrolysis Displacement

Question 37

What are the elements on the central back of the periodic table called?

Answer 37

Transition metals

Question 38

What properties do the transition metals have?

Answer 38

Metals with similar properties; they are good conductors of heat and electricity, are strong, can be bent

Question 39

What properties does copper have?

Answer 39

Good conductors of heat Does not react with water Can be bent Good conductors of electricity

Question 40

What is copper used for?

Answer 40

Pipes | Electrical wiring

Question 41

What is usually used instead of pure metals?

Answer 41

Alloys as they are stronger

Question 42

What is iron made into?

Answer 42

Steels

Question 43

What is gold used for?

Answer 43

It is used as an alloy for jewellery

Question 44

What is aluminium used for?

Answer 44

It is alloyed and used in buildings and aircraft

Question 45

What are copper alloys?

Answer 45

Bronze and brass

Question 46

What is bad about mining?

Answer 46

It involves digging up and processing large amounts of rock which can produce large amounts of waste

Question 47

Why is recycling important?

Answer 47

It saves the energy needed to extract the metal it saves resources because les sore need to be mined and less fossil fuels need to be used

Question 48

What are the benefits of using metals in construction?

Answer 48

``` Storing Can be bent Can be made into flexible,wires Good d Electrical conductors ```

Question 49

What are the disadvantages of using metals in construction?

Answer 49

Causes pollution Uses limited resources More expensive than other materials Iron and steel rust

Question 50

Why is gold found in the earth as the metal?

Answer 50

It is very unreactive and low in the reactivity

Question 51

Name three types of steel and a property for each

Answer 51

Low carbon steel, easily shaped | High carbon steel, hard stainless steel resists corrosion

Question 52

What is an ore?

Answer 52

Rock which contains enough metal to make it economically worthwhile to extract the metal