2 marksImpact of Metals on Living Systems and the Environment

CSEC Chemistry · January 2015 · Paper 2 · Question 6(a)(i)

Mineral nutrients and soil acidity are important for healthy plant growth.

Identify ONE element that is essential for plant growth and state ONE effect of its deficiency.

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6(a)(ii)Design an experiment to investigate the effect of the deficiency stated in (a) (i) above on plant growth.[4 marks]
6(b)(i)State ONE problem associated with acidic soils.[1 mark]
6(b)(ii)Use a balanced ionic equation to explain how the addition of lime can increase the pH of acidic soils.[2 marks]
6(b)(iii)Lime can also cause nitrogen to be lost from soils. State a reason for this. Include a balanced ionic equation with state symbols in your answer.[3 marks]
6(c)Identify TWO such disadvantages and suggest ONE way to address ONE of these disadvantages.[3 marks]

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