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1 markUses of Metals

CSEC Chemistry · May/June 2019 · Paper 2 · Question 6(a)(i)

Metal alloys are often used in place of metals because of their enhanced properties.

Define the term 'alloy'.

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  1. 6(a)(ii)Name ONE alloy of aluminium and state its use based on one of its enhanced properties.[3 marks]
  2. 6(b)(i)State which of the TWO metals is more reactive: Fe or Zn. Give a reason for your answer.[2 marks]
  3. 6(b)(ii)Using the data in Table 3 on page 22, deduce the order of reactivity of the four metals Cu, Fe, Zn and Pb, from the most reactive to the least reactive metal.[2 marks]
  4. 6(b)(iii)Account for the observations made from the reaction between the iron and copper sulfate solution.[2 marks]
  5. 6(b)(iv)Write the ionic equation, including state symbols, for the reaction between the iron and copper sulfate solution.[2 marks]
  6. 6(c)(i)Identify which of the metals used in the experiment in (b) is MOST hazardous to the environment.[1 mark]
  7. 6(c)(ii)State TWO harmful effects of continuous exposure to the metal identified in (c)(i) on human beings.[2 marks]

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