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2 marksMetals, Non-Metals and Corrosion

CSEC Integrated Science · May/June 2013 · Paper 2 · Question 2(b)(ii)

An experiment investigates conditions for rusting using three boiling tubes: A (nail, sealed with stopper, anhydrous calcium chloride), B (nail exposed to air), and C (nail in boiled water sealed with paraffin).

Explain your answer in (b)(i).

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 2(a)Distinguish between corrosion and rusting.[2 marks]
  2. 2(b)(i)In which boiling tube will the nail show the MOST rust after one month?[1 mark]
  3. 2(b)(iii)State the purpose of the anhydrous calcium chloride in Boiling Tube A.[1 mark]
  4. 2(b)(iv)Identify which boiling tube is set up as a control.[1 mark]
  5. 2(b)(v)State whether rusting would occur if stainless steel nails are used instead of iron nails, and give a reason.[2 marks]
  6. 2(b)(vi)Based on your answer in (b)(v), suggest ONE use of stainless steel in the home.[1 mark]
  7. 2(b)(vii)State ONE method that can be used to prevent rusting.[1 mark]
  8. 2(c)Outline TWO advantages and TWO disadvantages of using plastic taps instead of brass taps.[4 marks]

More practice: the rest of this paper · more Metals, Non-Metals and Corrosion questions · all CSEC Integrated Science past papers