Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Gases in the Atmosphere
86 practice questions
Topics covered
Practice questions
21–30 of 35 · Easy
Question 21
3 marks · Easy
Answer and see the solution →This question is about oxides and their properties.
(a)[1 mark]State whether iron(III) oxide is likely to be acidic, basic or neutral.
(b)[1 mark]Give the type of element which forms carbon monoxide.
(c)[1 mark]State a general property of metal oxides.
Question 22
2 marks · Easy
Answer and see the solution →A student burns 2.0 g of sodium in oxygen to form sodium oxide ( ). Sodium oxide is then added to water, and a solution forms that turns universal indicator blue.
Calculate the mass of sodium oxide formed (using Ar: Na = 23, O = 16), and state whether sodium oxide is an acidic or basic oxide.
Question 23
2 marks · Easy
Answer and see the solution →When 1.6 g of phosphorus is burned in excess oxygen, phosphorus(V) oxide ( ) is formed as a white solid.
Calculate the mass of oxygen that reacts (Ar: P = 31, O = 16), and state whether phosphorus(V) oxide is acidic or basic.
Question 24
1 mark · Easy
Answer and see the solution →State one effect that increased carbon dioxide in the atmosphere can have on our environment.
Question 25
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 26
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 27
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 28
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 29
1 mark · Easy
Answer and see the solution →Name the gas that is produced when calcium carbonate is heated strongly in the laboratory.
Question 30
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.