Fossil fuels contain carbon and hydrogen - AQA - GCSE Chemistry - Question 1 - 2014 - Paper 1
Question 1
Fossil fuels contain carbon and hydrogen.
(a) (i) Use the Chemistry Data Sheet to help you answer this question.
Complete Figure 1 to show the electronic structure... show full transcript
Worked Solution & Example Answer:Fossil fuels contain carbon and hydrogen - AQA - GCSE Chemistry - Question 1 - 2014 - Paper 1
Step 1
Complete Figure 1 to show the electronic structure of a carbon atom.
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Answer
In Figure 1, draw 6 electrons represented as dots in the appropriate distribution around the carbon atom. Carbon has 2 electrons in the first shell and 4 in the second shell, so the drawing should have 2 dots in the center (for the first shell) and 4 dots around the outer shell (for the second shell).
Step 2
Complete the word equation for the oxidation of hydrogen.
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Answer
The complete word equation for the oxidation of hydrogen is:
hydrogen + oxygen → water (or steam).
Step 3
Name two products of burning coal that have an impact on the environment.
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Answer
Two products of burning coal that impact the environment are:
Carbon dioxide
Sulfur dioxide
Step 4
What impact does each of the products named have on the environment?
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Answer
Carbon dioxide:
Causes global warming due to the greenhouse effect.
Sulfur dioxide:
Causes acid rain, which can harm plants and aquatic ecosystems by lowering water pH.
