The primary cause of acid rain is the atmospheric presence of:
ACarbon dioxide and methane
BSulphur dioxide (SO2) and nitrogen oxides (NOx)
CCFCs and ozone
DCarbon monoxide and lead particles
Question 2
BOD (Biochemical Oxygen Demand) is used to measure:
AThe amount of oxygen dissolved in clean drinking water
BThe degree of organic pollution in water
CThe bacterial count per millilitre of water
DThe amount of heavy metals in industrial effluent
Question 3
Eutrophication of water bodies is caused by excess runoff of:
AHeavy metals from mining operations
BNitrogen and phosphorus from
CPetroleum products from oil spills
DChloride ions from road salt
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