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2.5 Types of substance

2.5 Types of substance

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Question 25

An industrial smelting crucible is lined with magnesium oxide (MgOMgOMgO), which has a melting point of 2852∘C2852^{\circ}\text{C}2852∘C.

Explain, in terms of structure and bonding, why magnesium oxide has such a high melting point and is therefore suitable for this high-temperature application.

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Markscheme

2.5 Types of substance Questions

  1. GCSE
  2. /Chemistry
  3. /2.5 Types of substance

59 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.

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