Chemistry Unit C1 Worksheet - Study And Revision Pack (Foundation Paper) Page 4
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34C1.1 Exam Questions – 26 marks, 26 minutes
Q1.
(a) (i) The composition of the atmosphere changes when fossil fuels are burned in air.
When methane undergoes complete combustion carbon dioxide and water are formed.
Write the word equation for the complete combustion of methane.
(2)
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(ii) Incomplete combustion of methane can produce carbon and carbon monoxide.
Describe some of the problems caused by these products.
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(b) Describe how impurities in fossil fuels result in the formation of acid rain.
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*(c) Some processes release carbon dioxide into the atmosphere and other processes remove it.
Describe some natural processes and human activities that release carbon dioxide and some that
remove it.
(6)
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(Total for Question is 12 marks)
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