Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Gases in the Atmosphere
86 practice questions
Topics covered
Practice questions
51–60 of 86
Question 51
2 marks · Normal
Answer and see the solution →Hydrogen burns in oxygen to form water. State whether water is an acidic, basic, or neutral oxide and give a reason for your answer.
Question 52
4 marks · Normal
Answer and see the solution →Sulfur burns in air to form sulfur dioxide.
(a)[1 mark]Write a balanced equation for the reaction of sulfur with oxygen.
(b)[1 mark]State whether sulfur dioxide is acidic, basic or neutral.
(c)[2 marks]Explain your answer to (b).
Question 53
3 marks · Normal
Answer and see the solution →When 4.8 g of magnesium is completely burned in excess oxygen, magnesium oxide (MgO) is formed. Magnesium oxide is then added to water, and only a small amount dissolves to form an alkaline solution.
Use the equation below and the information given to answer the following questions.
(Relative atomic masses: Mg = 24, O = 16)
(a)[3 marks]Calculate the maximum mass of magnesium oxide (MgO) produced when all of the 4.8 g of magnesium reacts. Show your working.
Question 54
2 marks · Hard
Answer and see the solution →Calcium reacts with oxygen to form calcium oxide. State whether calcium oxide is acidic, basic or neutral. Explain your answer.
Question 55
5 marks · Hard
Answer and see the solution →This question is about the nature of oxides.
(a)[2 marks]Complete the table by identifying whether each oxide is acidic, basic or neutral.
Oxide Type (acidic, basic or neutral) Sodium oxide Carbon dioxide (b)[3 marks]Explain your answers for both oxides, referring to the type of element each oxide is formed from.
Question 56
2 marks · Hard
Answer and see the solution →When phosphorus is burned in oxygen, phosphorus(V) oxide is formed. State whether phosphorus(V) oxide is acidic, basic or neutral. Give a reason for your answer.
Question 57
1 mark · Easy
Answer and see the solution →State one effect that increased carbon dioxide in the atmosphere can have on our environment.
Question 58
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 59
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 60
2 marks · Easy
Answer and see the solution →Explain why heating sodium carbonate does not produce carbon dioxide gas, while heating magnesium carbonate does.