1 markImpact of Metals on Living Systems and the Environment

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

Some metal compounds are health and environmental hazards.

Identify which of the metals used in the experiment in (b) is MOST hazardous to the environment.

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Other parts of this question

6(a)(i)Define the term 'alloy'.[1 mark]
6(a)(ii)Name ONE alloy of aluminium and state its use based on one of its enhanced properties.[3 marks]
6(b)(i)State which of the TWO metals is more reactive: Fe or Zn. Give a reason for your answer.[2 marks]
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]
6(b)(iii)Account for the observations made from the reaction between the iron and copper sulfate solution.[2 marks]
6(b)(iv)Write the ionic equation, including state symbols, for the reaction between the iron and copper sulfate solution.[2 marks]
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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