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2.2 How bonding and structure are related to the properties of substances

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Question 26

A glassworks uses a reusable metal stamp to mark hot glass. The stamp must:

  • have a hardness of at least 150 arbitrary units
  • remain solid when its temperature reaches 1200 ∘C1200\ ^\circ\text{C}1200 ∘C.

The table gives data for three possible materials.

MaterialHardness in arbitrary unitsMelting point in ∘C^\circ\text{C}∘C
Pure nickel701455
Nickel alloy P1601320
Nickel alloy Q1951120
a.

Which material should be used? Explain your choice.

[3]
b.

Explain why nickel alloy P is harder than pure nickel.

[3]
Markscheme

2.2 How bonding and structure are related to the properties of substances Questions

  1. GCSE
  2. /Chemistry
  3. /2.2 How bonding and structure are related to the properties of substances

84 exam-style questions on AQA GCSE Chemistry 2.2 How bonding and structure are related to the properties of substances, covering 2.2.1a The three states of matter, 2.2.1b Limitations of the simple particle model, 2.2.2 State symbols in chemical equations, 2.2.3 Properties of ionic compounds, 2.2.4 Properties of small molecules, 2.2.5 Polymers, 2.2.6 Giant covalent structures, 2.2.7 Properties of metals and alloys, and 2.2.8 Metals as conductors. Each one has a worked solution and a mark scheme showing where the marks go.

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