Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Carbon dioxide and global warming: the greenhouse effect
19 practice questions
Practice questions
1–10 of 19
Question 1
1 mark · Easy
Answer and see the solution →State one effect that increased carbon dioxide in the atmosphere can have on our environment.
Question 2
3 marks · Easy
Answer and see the solution →A student heated zinc carbonate in a test tube to produce carbon dioxide gas.
(a)[1 mark]Write a balanced chemical equation, including state symbols, for this reaction.
(b)[1 mark]Name the type of reaction taking place when zinc carbonate breaks down on heating.
(c)[1 mark]State what you would observe inside the test tube as the reaction proceeds.
Question 3
2 marks · Easy
Answer and see the solution →In 1980, the average global concentration of carbon dioxide was 340 ppm (parts per million). In 2020, it increased to 415 ppm. Calculate the increase in CO2 concentration over this period.
Question 4
2 marks · Easy
Answer and see the solution →Explain why heating sodium carbonate does not produce carbon dioxide gas, while heating magnesium carbonate does.
Question 5
3 marks · Easy
Answer and see the solution →Below is a table showing average yearly global CO2 concentrations for three years:
Average global CO2 concentrations Year CO2 concentration (ppm) 2000 370 2010 390 2020 415 (a)[1 mark]Describe the trend shown by the data.
(b)[1 mark]Calculate the average increase in CO2 concentration per decade over the period 2000–2020.
(c)[1 mark]State one possible environmental consequence of this trend.
Question 6
1 mark · Easy
Answer and see the solution →Name the gas that is produced when calcium carbonate is heated strongly in the laboratory.
Question 7
3 marks · Easy
Answer and see the solution →The greenhouse effect is important for life on Earth.
(a)[1 mark]Explain what is meant by the term 'greenhouse gas'.
(b)[1 mark]State why carbon dioxide, but not nitrogen, is a greenhouse gas.
(c)[1 mark]Give one way in which human activities have increased the amount of carbon dioxide in the atmosphere.
Question 8
2 marks · Easy
Answer and see the solution →A student heats 1.2 g of magnesium carbonate (ce{MgCO3}) and all of it decomposes. Calculate the maximum mass of carbon dioxide gas that can be produced. (Relative atomic masses: Mg = 24, C = 12, O = 16)
Question 9
2 marks · Normal
Answer and see the solution →State two environmental effects that rising levels of carbon dioxide in the atmosphere may cause.
Question 10
4 marks · Normal
Answer and see the solution →When magnesium carbonate is heated strongly, it decomposes.
(a)[1 mark]Write a balanced chemical equation for the thermal decomposition of magnesium carbonate.
(b)[1 mark]Name the type of reaction taking place.
(c)[2 marks]Describe what would be observed when magnesium carbonate is heated in a test tube.