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
181–190 of 359 · Easy
Question 181
2 marks · Easy
Answer and see the solution →A student heats 10.0 g of zinc sulfide (ZnS) strongly in air. The reaction converts all the ZnS into zinc oxide (ZnO) and releases sulfur dioxide gas.
If the mass of zinc oxide produced is 12.0 g, calculate the mass of sulfur dioxide given off.
Question 182
1 mark · Easy
Answer and see the solution →State the main method used to extract zinc from zinc oxide.
Question 183
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the reducing agent used to extract iron from iron(III) oxide in the blast furnace.
(b)[1 mark]Write the chemical formula for iron(III) oxide.
(c)[1 mark]Name the process by which iron(III) oxide is converted to iron during extraction.
Question 184
2 marks · Easy
Answer and see the solution →Calculate the total number of moles of oxygen atoms removed when 1.0 mole of Fe2O3 is reduced using carbon monoxide.
Question 185
2 marks · Easy
Answer and see the solution →Explain, using the reactivity series, why copper can be extracted from copper(II) oxide by heating with carbon but magnesium cannot.
Question 186
3 marks · Easy
Answer and see the solution →The table shows the position of several metals in the reactivity series relative to carbon:
Metal Position in series Potassium above carbon Lead below carbon Iron below carbon Aluminium above carbon (a)[1 mark]Name two metals from the table that can be extracted by heating their oxides with carbon.
(b)[1 mark]Explain why potassium cannot be extracted by reduction with carbon.
(c)[1 mark]Suggest the method used to extract aluminium from aluminium oxide.
Question 187
1 mark · Easy
Answer and see the solution →Give the name of the ore that is a major source of iron.
Question 188
3 marks · Easy
Answer and see the solution →(a)[1 mark]State one economic reason why the extraction of iron using carbon is preferred over electrolysis.
(b)[1 mark]Write the balanced chemical equation for the reduction of iron(III) oxide with carbon.
(c)[1 mark]Identify which substance is reduced in this reaction.
Question 189
2 marks · Easy
Answer and see the solution →Given the equation: \ce{Fe2O3(s) + 3CO(g) -> 2Fe(l) + 3CO2(g)}. Calculate the mass of iron produced when 32.0 g of Fe2O3 reacts completely. (Relative atomic masses: Fe = 56, O = 16)
Question 190
1 mark · Easy
Answer and see the solution →State why magnesium cannot be extracted from its oxide by reduction with carbon.