Diamond has a very high melting point.
Which statement explains why?
A lot of energy is needed to overcome strong intermolecular forces.
A lot of energy is needed to break many strong covalent bonds.
A lot of energy is needed to overcome attraction between oppositely charged ions.
A lot of energy is needed to separate the delocalised electrons from the ions.
60 exam-style questions on OCR GCSE Chemistry 2.3 Properties of materials, covering 2.3.1 Carbon bonding and the variety of organic compounds, 2.3.2 Diamond, graphite, fullerenes and graphene, 2.3.3 Bond strength, changes of state and predicting states, 2.3.4 Bulk properties and types of bonding, and 2.3.5 Nanoparticles: scale, surface area, uses and risks. Each one has a worked solution and a mark scheme showing where the marks go.