Sulfur

Question 1

Sources of sulphur

Answer 1

Natural gas and petroleum

Question 2

Uses of sulphur

Answer 2

It is used in the contact process for the manufacture of sulfuric acid
Preservative for food by killing bacteria

Question 3

Contact process

Answer 3

Sulfur is burnt in air to form sulfur dioxide
This is mixed with oxygen to form sulfur trioxide
Instead of adding sulfur trioxide directly to water, sulfur trioxide is dissolved in concentrated sulfuric acid first to produce oleum
Water is then added to oleum to form sulfuric acid.

Question 4

Conditions required for the contact process

Answer 4

400-450 degrees Celsius
1-2 atmospheres
Vanadium (V) Oxide catalyst

Question 5

Properties of dilute sulfuric acid

Answer 5

It is a strong acid

Question 6

Uses of dilute sulfuric acid

Answer 6

Making fertilizers
Treat metals and remove oxidation before painting
Laboratory reagent
Acid in car batteries

Question 7

Properties of concentrated sulfuric acid

Answer 7

Strong acid
Powerful dehydrating agent
Powerful oxidizing agent

Question 8

Uses of concentrated sulfuric acid

Answer 8

Making detergents
Catalyst
Dehydrating agent