Subsection 10.1. Water for Chemistry, O Level - revisedeck

10.1. Water

A subsection of Chemistry, 5070, through 10. Chemistry of the environment

Listing 10 of 85 questions

The following stages happen during eutrophication. increase in growth of algae increase in nitrate concentration death of aquatic plants decrease in dissolved oxygen In which order do these stages occur?

5070_w08_qp_1

MCQ

2008

Paper 1, Variant 0

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The following stages happen during eutrophication. increase in growth of algae increase in nitrate concentration death of aquatic plants decrease in dissolved oxygen In which order do these stages occur?

5070_w13_qp_11

MCQ

2013

Paper 1, Variant 1

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The following stages happen during eutrophication. increase in growth of algae increase in nitrate concentration death of aquatic plants decrease in dissolved oxygen In which order do these stages occur?

5070_w13_qp_12

MCQ

2013

Paper 1, Variant 2

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Nitrogenous fertilisers can cause eutrophication to occur in rivers. Eutrophication involves the five stages listed. The fertiliser is washed into the river. Oxygen levels become depleted in the river. Plants die. Plants begin to decay. Plants in the river grow at an increased rate. In which order do these five stages occur during eutrophication?

5070_w17_qp_11

MCQ

2017

Paper 1, Variant 1

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Four processes are used during the purification of water. ● use of carbon ● desalination ● chlorination ● filtration The purposes, W, X, Y and Z, for these processes are listed. W disinfection X removal of solids Y removal of dissolved salts Z removal of tastes and odours What is the purpose for each process?

5070_w20_qp_12

MCQ

2020

Paper 1, Variant 2

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Questions Discovered

85