Aluminium chloride is a compound of a metal and a non-metal. It changes directly from a solid into a vapour at 180 ∘C180\,^\circ\mathrm{C}180∘C. When it is melted under pressure, the liquid does not conduct electricity.
Which classification of aluminium chloride, with its reason, is correct?
ionic, because it is a compound formed from a metal and a non-metal element
simple molecular, because it vaporises at a low temperature and has no ions
giant covalent, because the liquid formed does not conduct electricity
ionic, because ionic compounds do not conduct electricity when solid
48 exam-style questions on Edexcel GCSE Chemistry 2.5 Types of substance, covering 2.5.1 Classifying substances by structure and bonding, 2.5.2 Properties of ionic and simple molecular substances, 2.5.3 Giant covalent structures: diamond and graphite, 2.5.4 Fullerenes, graphene and simple polymers, 2.5.5 Properties of metals and non-metals, and 2.5.6 Limitations of bonding models and representations. Each one has a worked solution and a mark scheme showing where the marks go.