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 359 · Easy
Question 91
3 marks · Easy
Answer and see the solution →The table shows solutions formed by dissolving some oxides in water:
Solutions of different oxides Oxide Solution pH Aluminium oxide 7 Sulfur dioxide 3 Potassium oxide 13 (a)[1 mark]Which oxide forms a neutral solution? Give its pH.
(b)[1 mark]State whether sulfur dioxide is a metal oxide or a non-metal oxide.
(c)[1 mark]Explain why potassium oxide gives a pH of 13.
Question 92
1 mark · Easy
Answer and see the solution →Give an example of an acidic oxide.
Question 93
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 94
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 95
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 96
1 mark · Easy
Answer and see the solution →State one effect that increased carbon dioxide in the atmosphere can have on our environment.
Question 97
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 98
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 99
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 100
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.