15: Diamond and graphite

Question 1

Properties of diamond

Answer 1

Insoluble in water
Does not conduct electricity
Hard
High melting point
Colourless
Transparent
Lustrous

Question 2

Uses of diamond

Answer 2

Jewellery

Cutting tools such as drill bits, glass cutters and dental drills

Question 3

Properties of graphite

Answer 3

Black
Lustrous
Opaque
Soft
Slippery
High melting point
Insoluble in water
Conducts electricity

Question 4

Uses of graphite

Answer 4

Lubricant
Pencil lead
Electrodes in electrolysis

Question 5

Structure of diamond

Answer 5

Each carbon atom is joined to four other carbon atoms
No free electrons
Strong covalent bonds

Question 6

Structure of graphite

Answer 6

Layered
Free electrons (delocalised)
Weak forces between layers
Strong covalent bonds in layers