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
171–180 of 869
Question 171
8 marks · Hard
Answer and see the solution →This question is about the reactions between halogens and halide ions.
(a)[2 marks]Chlorine water is added to a solution of sodium bromide.
Write the ionic equation for the reaction that takes place.
(b)[2 marks]Explain why chlorine is able to displace bromine from sodium bromide solution but not the other way around.
(c)The reaction between chlorine and sodium bromide is a redox reaction.
For this reaction:
(i)[2 marks]Identify which species is oxidised and which is reduced.
(ii)[2 marks]Use your knowledge of electron transfer to explain your answer to part (c)(i).
Question 172
1 mark · Easy
Answer and see the solution →State the approximate percentage by volume of oxygen in dry air.
Question 173
3 marks · Easy
Answer and see the solution →Describe how an experiment using phosphorus could be used to show the percentage of oxygen in air.
(a)[1 mark]State what happens to the phosphorus when it reacts in a jar of air.
(b)[1 mark]Describe how the volume of air changes during the experiment.
(c)[1 mark]Explain how the result of this change can be used to find the percentage of oxygen in air.
Question 174
2 marks · Easy
Answer and see the solution →A 250 cm³ sample of dry, unpolluted air is analysed.
Calculate the approximate volume of argon in the sample. Give your answer to 2 decimal places.
Question 175
2 marks · Easy
Answer and see the solution →Explain why it is important to use excess copper in the experiment to determine the percentage of oxygen in air using copper.
Question 176
3 marks · Easy
Answer and see the solution →The table below shows the major gases in dry, unpolluted air.
Main gases in dry air Gas Percentage by volume (%) Nitrogen Oxygen Argon Carbon dioxide Question 177
1 mark · Easy
Answer and see the solution →Name one substance (other than a metal) that can be used to remove oxygen from air in an experiment to determine its percentage.
Question 178
3 marks · Easy
Answer and see the solution →Answer the following about the gases in dry, unpolluted air.
(a)[1 mark]Name the most abundant gas in dry air.
(b)[1 mark]State the gas present in the smallest amount from the main four gases.
(c)[1 mark]Give the percentage by volume of carbon dioxide in dry air, to two decimal places.
Question 179
2 marks · Easy
Answer and see the solution →In an experiment to find the percentage of oxygen in air using iron filings, the total air volume at the start is 180 cm³. At the end, the volume is 143 cm³. Calculate the percentage of oxygen in the air. Give your answer to the nearest whole number.
Question 180
2 marks · Normal
Answer and see the solution →State the names and approximate percentages by volume of the two most abundant gases present in dry air.