Chemistry Unit C1 Worksheet - Study And Revision Pack (Foundation Paper) Page 22
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34(c) An experiment was carried out to investigate the conditions necessary for iron to corrode.
Three test tubes, A, B and C, had identical iron nails placed in them as shown.
After two weeks,
• the nail in tube A had not rusted
• the nail in tube B had rusted
• the nail in tube C had not rusted.
Explain why the iron nail in test tube B rusted and the iron nails in test tubes A and C did not.
(2)
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(d) Scrap iron can be recycled.
Explain an advantage of recycling scrap iron rather than extracting iron from iron compounds
found in the Earth.
(2)
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