Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Inorganic Chemistry
869 practice questions
Topics covered
- The Alkali Metals85 practice questions
- The Halogens86 practice questions
- Gases in the Atmosphere86 practice questions
- Reactivity Series163 practice questions
- Extraction and Uses of Metals128 practice questions
- Acids, Alkalis and Titrations83 practice questions
- Acids, Bases and Salt Preparations156 practice questions
- Chemical Tests68 practice questions
Practice questions
91–100 of 374 · Normal
Question 91
1 mark · Normal
Answer and check →Which statement about metal oxides is correct?
- A.They are always acidic.
- B.They are usually basic.
- C.They are usually neutral.
- D.They react with water to form acidic solutions.
Question 92
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 93
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 94
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 95
2 marks · Normal
Answer and see the solution →State two environmental effects that rising levels of carbon dioxide in the atmosphere may cause.
Question 96
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 97
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 98
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 99
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 100
2 marks · Normal
Answer and see the solution →Explain why carbon dioxide is described as a greenhouse gas.