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The Earth’s atmosphere today contains a mixture of different gases - Edexcel - GCSE Chemistry - Question 1 - 2014 - Paper 1
Question 1
The Earth’s atmosphere today contains a mixture of different gases. (a) The pie chart shows the percentages of nitrogen, oxygen and other gases in the atmosphere. ... show full transcript
Worked Solution & Example Answer:The Earth’s atmosphere today contains a mixture of different gases - Edexcel - GCSE Chemistry - Question 1 - 2014 - Paper 1
Step 1
Which row of the table identifies X, Y and Z correctly?
Answer
To interpret the pie chart, we need to identify the gases represented by sections X, Y, and Z based on their proportions. Since the pie chart is not provided, we must assume standard proportions of gases in the Earth's atmosphere: nitrogen (approximately 78%), oxygen (approximately 21%), and other gases (approximately 1%).
Given this, we can deduce:
- X is likely the other gases as they represent the smallest slice.
- Y would be oxygen as it holds a considerable proportion of the atmosphere.
- Z would be nitrogen as it represents the largest slice.
Therefore, the correct option based on these identifications is:
- C: oxygen for Y, other gases for X, and nitrogen for Z.