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10.3 Using materials

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Question 12
F

Blocks of zinc bolted to a steel pier have to be replaced every few years. Why do they need replacing?

[1]
A

The zinc slowly reacts with the steel and forms an alloy with the iron

B

The zinc is gradually corroded away because it reacts in place of iron

C

The zinc slowly turns into a barrier layer that flakes off of the steel

D

The zinc is gradually worn away by the movement of the sea water past

Markscheme

10.3 Using materials Questions

  1. GCSE
  2. /Chemistry
  3. /10.3 Using materials

40 exam-style questions on AQA GCSE Chemistry 10.3 Using materials, covering 10.3.1 Corrosion and its prevention, 10.3.2 Alloys as useful materials, and 10.3.3 Ceramics, polymers and composites. Each one has a worked solution and a mark scheme showing where the marks go.

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