Chemical Reactions

Question 1

What are the 5 chemical reactions?

Answer 1

Combustion
Thermal decomposition
Oxidation
Displacement
Neutralisation

Question 2

What is combustion?

Answer 2

Combustion is burning in oxygen e.g. burning of methane to form carbon dioxide and water

Question 3

What is thermal decomposition?

Answer 3

Thermal decomposition is breaking down of a compound using heat e.g. calcium carbonate decomposes into calcium oxide and carbon dioxide

Question 4

What is oxidation?

Answer 4

Oxidation is the gain of oxygen e.g. magnesium gaining oxygen to form magnesium oxide

Question 5

What is displacement?

Answer 5

Displacement reactions are ones in which the element will take the place of another e.g. magnesium displacing the copper from copper sulphate

Question 6

What is neutralisation?

Answer 6

Neutralisation is a chemical reaction between an acid and alkali.
In a neutralisation reaction an acid reacts with an alkali.

Question 7

Acid and alkalis neutralise each other e.g.

Answer 7

Acid + alkali —>salt + water

Question 8

Which salts are formed in neutralisation?

Answer 8

Hydrochloric acid reacts to form chloride
Sulfuric acid reacts to form sulphate
Nitric acid reacts to form a nitrate