1. Name: _______________( ) Class: 3_________
Date: ____________
Section A
Each MCQ is 1 mark
1. Which of these reactions in the atmosphere leads to acid rain?
A. Magnesium + oxygen -> magnesium dioxide
B. Sulfur + oxygen -> sulfur dioxide
C. Carbon dioxide + hydrogen -> hydrogen carbonate
D. Sulfur dioxide + water -> sulfuric acid
2. Acid Rain does not cause which of the following?
A. Soil with a low Ph
B. Global Warming
C. Damage to trees
D. Erosion of limestone and cement
3. Holes in the ozone layer are thought to have been caused by:

2. A. Carbon Monoxide
B. CFC’s
C. Methane
D. Carbon dioxide
4. Which of the following are the pollutants?
A. Unburnt hydrocarbons
B. Carbon Monoxide
C. Sulfur Dioxide
D. Nitrogen
1. A and B only
2. A and D only
3. C, D and B only
4. A, B and C only
5. Sulfur dioxide levels can be reduced by using:

3. A. Catalytic converters
B. Static electricity to attract it in factory chimneys
C. More efficient car engines
D. Low sulfur fuels
6. Carbon dioxide molecule shape is?
A. Linear
B. Trigonal planar
C. T- Shape
D. Bent (V-shape)
Section B

4. 1a. Describe the process of Nitrogen oxides and Nitrogen dioxide being
produced. (2 marks)
At high temperatures, nitrogen and oxygen in the air combine to form nitrogen
monoxide. The nitrogen monoxide combines with more oxygen molecules in the
atmosphere to become nitrogen dioxide
1b. Write a balanced equation on how is nitrogen oxide being produced.
(1mark)
2NO + O2 à 2NO2
2. What are the consequences of Global Warming? (2marks)
The polar ice caps will melt. Seawater will expand and sea levels will rise,
causing frequent flooding of low-lying areas. Aquatic animals’ habitats will
be greatly affected, causing animals like polar bears to become extinct.
3b. What are the disadvantages of using wind energy? (3marks)
The main disadvantage regarding wind power is down to the winds
unreliability factor. In many areas, the winds strength is too low to support
a wind turbine, thus producing electricity at a slower rate. Wind turbines
generally produce less electricity than the average fossil fuelled power

5. station, requiring multiple wind turbines to be built in order to make an
impact.
4. What is hybridization? (1mark)
Hybridization is the mixing of a set of atomic orbitals on an atom to create a
new set of hybrid orbitals with the same total electron capacity and with
properties and energies intermediate between those of the original
unhybridized orbitals.
~End of Paper~