Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Carbon dioxide and global warming: the greenhouse effect
19 practice questions
Practice questions
1–8 of 8 · Normal
Question 1
2 marks · Normal
Answer and see the solution →State two environmental effects that rising levels of carbon dioxide in the atmosphere may cause.
Question 2
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.
Question 3
3 marks · Normal
Answer and see the solution →A student heats potassium carbonate in a test tube and observes no visible change. Use your knowledge of the thermal decomposition of metal carbonates to explain this result.
Question 4
4 marks · Normal
Answer and see the solution →The table shows estimated global carbon dioxide (CO2) levels and average surface temperatures at two different years:
Year CO2 concentration / ppm Average temperature / °C 1850 285 13.6 2020 415 14.9 (a)[1 mark]Describe the trend shown by the data.
(b)[1 mark]Suggest a possible link between the CO2 levels and average surface temperature.
(c)[2 marks]Explain one environmental consequence of this link.
Question 5
1 mark · Normal
Answer and check →Which of the following is a balanced equation for the thermal decomposition of calcium carbonate?
- A.
- B.
- C.
- D.
Question 6
2 marks · Normal
Answer and see the solution →Explain why carbon dioxide is described as a greenhouse gas.
Question 7
4 marks · Normal
Answer and see the solution →A student performs an experiment by heating copper(II) carbonate in a test tube over a Bunsen burner.
(a)[1 mark]State the initial colour of copper(II) carbonate.
(b)[1 mark]Describe the change in appearance during heating.
(c)[2 marks]Name the gas released and describe a test to confirm its identity.
Question 8
3 marks · Normal
Answer and see the solution →In the year 1800, the concentration of carbon dioxide (CO₂) in the atmosphere was about 280 parts per million (ppm). In 2020, it was measured at approximately 410 ppm.
Calculate the percentage increase in carbon dioxide concentration in the atmosphere between 1800 and 2020. Show your working and give your answer to 1 decimal place.