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6.1 Improving processes and products

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Question 18

A section of steel pipe is completely filled with water that contains no dissolved oxygen.

Which action would allow the inside surface of the pipe to rust?

[1]
A

Add salt while keeping dissolved oxygen out of the pipe

B

Let oxygen dissolve in the water inside the pipe

C

Drain the water, dry the pipe, then fill it with dry oxygen

D

Add more water without allowing oxygen into the pipe

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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