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6.1 Improving processes and products

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Question 10

An iron helmet is kept in a sealed museum case. The air in the case contains oxygen but no water vapour.

Which change could cause the helmet to rust?

[1]
A

Remove the oxygen before adding water vapour

B

Add water vapour and leave the oxygen in the case

C

Add more oxygen but keep the case dry

D

Add salt but keep the air in the case dry

Markscheme

6.1 Improving processes and products Questions

  1. GCSE
  2. /Chemistry
  3. /6.1 Improving processes and products

136 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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