Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Carbon dioxide and global warming: the greenhouse effect
19 practice questions
Practice questions
11–19 of 19
Question 11
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 12
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 13
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 14
2 marks · Normal
Answer and see the solution →Explain why carbon dioxide is described as a greenhouse gas.
Question 15
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 16
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.
Question 17
2 marks · Hard
Answer and see the solution →Explain two reasons why an increase in the concentration of carbon dioxide in the atmosphere could lead to changes in Earth's climate.
Question 18
5 marks · Hard
Answer and see the solution →A student heats a sample of iron(II) carbonate to investigate the formation of carbon dioxide gas.
(a)[2 marks]Write the balanced chemical equation, including state symbols, for the thermal decomposition of iron(II) carbonate.
(b)[1 mark]State the type of reaction taking place.
(c)[1 mark]Describe one observation the student would make as the reaction occurs.
(d)[1 mark]Name the gas formed in this reaction.
Question 19
2 marks · Hard
Answer and see the solution →Explain why carbon dioxide, but not nitrogen, can act as a greenhouse gas.