Metals

Question 0

What is the reducing agent in the blast furnace?

Answer 0

Carbon monoxide

Question 1

In refining copper, the ______ is impure and the ______ is pure.

Answer 1

1. Anode

2. Cathode

Question 2

What is stainless steel composed of?

Answer 2

70% iron, 20% chromium, 10% nickel

Question 3

State the reactions that take place inside a blast furnace (before the removal of impurities).

Answer 3

Carbon + oxygen –> carbon dioxide
Carbon + carbon dioxide –> carbon monoxide
Hematite + carbon monoxide –> iron + carbon dioxide

Question 4

What is the name for zinc ore and what is it predominantly made up of?

Answer 4

1. Zinc blende

2. Zinc sulphide

Question 5

What is mild steel composed of?

Answer 5

99.5% iron, 0.5% carbon

Question 6

Transition elements:
Form \_\_\_\_\_\_\_ compounds
Act as \_\_\_\_\_\_\_\_\_\_\_
Relatively \_\_\_\_\_\_ densities
Relatively \_\_\_\_\_\_ melting points

Answer 6

1. Coloured
2. Catalysts
3. High
4. High

Question 7

Group 7 metals:
______ non metals
Melting points ______ down the group
Colour becomes ______ down the group

Answer 7

1. Diatomic
2. Increase
3. Darker

Question 8

Order the reactivity of:

Zinc, potassium, calcium, hydrogen, copper, carbon, aluminium. Magnesium, iron, sodium

Answer 8

1. Potassium
2. Sodium
3. Calcium
4. Magnesium
5. Aluminium
6. Carbon
7. Zinc
8. Iron
9. Hydrogen
10. Copper

Question 9

What is the activity of a metal based on?

Answer 9

It’s tendency to form an ion

Question 10

What is the name for aluminium ore and what is it predominantly made up of?

Answer 10

1. Bauxite

2. Aluminium oxide

Question 11

State the 2 steps for the extraction of zinc.

Answer 11

1. Roasted in air - zinc blende + oxygen –> zinc oxide + sulfur dioxide
2. Separated using electrolysis in a furnace - zinc oxide + carbon monoxide –> zinc + carbon dioxide

Question 12

What is the name for iron ore and waht is it predominantly made up of?

Answer 12

1. Hematite

2. Iron oxide (Fe2O3)

Question 13

List the 4 things that go into a blast furnace in the extraction of iron from its ore.

Answer 13

1. Hematite
2. Carbon
3. Limestone
4. Ht air

Question 14

What is slag?

Answer 14

Calcium silicate

Question 15

What are the 2 reactions that take place to remove sand from iron?

Answer 15

Limestone –> calcium oxide + carbon dioxide

Calcium oxide + sand –> calcium silicate

Question 16

If elements are above carbon in the reactivity series, what can they do?

Answer 16

They cannot be reduced from their ore by carbon.

Question 17

If elements are below carbon in the reactivity series, what can they do?

Answer 17

They can be reduced from their ore by carbon.

Question 18

If elements are below hydrogen in the reactivity series, what will they do?

Answer 18

They will not react with acid.

Question 19

If elements are above hydrogen in the reactivity series, what will they do?

Answer 19

React with an acid.