Question 1
Which gas is present in the largest proportion in the exhaust fumes of a car engine?
carbon monoxide
carbon dioxide
water vapour
nitrogen
Which gas is present in the largest proportion in the exhaust fumes of a car engine?
carbon monoxide
carbon dioxide
water vapour
nitrogen
Oxides of nitrogen are released into the atmosphere in car engine exhaust fumes.
Which environmental problem below is not made worse by these exhaust fumes?
photochemical smog
the hole in the ozone layer
the corrosion of buildings
acidification of lakes
Which of the following is true?
Acid rain is caused by carbonic acid
Acid rain turns universal indicator red
Wet acid deposition includes snow and fog
Catalytic converters remove oxides of sulfur from car exhausts
What is the colour of universal indicator paper in rain water?
Red
Blue
Yellow
Green
A sample of acid rain water is tested and found to be pH 4. How does its hydrogen ion concentration compare to pure water?
1000 times more concentrated
3 times more concentrated
1000 times less concentrated
3 times less concentrated
What happens to the oxidation state of sulfur when it becomes sulfuric acid in acid rain?
It changes from 0 to -2
It changes from 0 to +4
It changes from 0 to +6
It changes from -2 to +6
One equation for the formation of acid rain from nitrogen dioxide is shown below.
2NO2 (g) + H2O (l) → HNO2 (aq) + HNO3 (aq)
What type of reaction is this?
Oxidation
Reduction
Redox
Acid-base
Which of the following are used in catalytic converters?
I and II only
I and III only
II and III only
I, II and III
A sample of rainwater is tested and found to be pH 6. Which of the following is not true?
The sample is acidic
The rainwater is acid rain
Blue litmus would turn red in the sample
The rain water is impure
Iron structures can be damaged by dry deposition such as the equation below:
Fe (s) + SO2 (g) + O2 (g) → FeSO4 (s)
Which is true?
I and II only
I and III only
II and III only
I, II and III