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
221–230 of 359 · Easy
Question 221
5 marks · Easy
Answer and see the solution →Aluminium and different types of steel are commonly used in construction and for making vehicles.
(a)[2 marks]Explain why aluminium resists corrosion and state one use of aluminium that makes use of this property.
(b)[3 marks]Mild steel and stainless steel are types of steel used in construction. For each type:
i) State ONE typical use.
ii) Explain, for each use, why that type of steel is suitable.
Question 222
5 marks · Easy
Answer and see the solution →A company is designing a new bridge. The main parts of the bridge can be made either from an aluminium alloy or from mild steel. The table below gives key properties of these materials:
Properties of aluminium alloy and mild steel Material Density (g/cm^3) Typical use Ability to resist corrosion Aluminium alloy 2.7 Aircraft, cables, building Yes Mild steel 7.8 Car bodies, bridges, nails No The bridge must be strong, corrosion-resistant, and lightweight.
(a)[2 marks]State one advantage and one disadvantage of using aluminium alloy instead of mild steel for the main structure of the bridge. Explain your choices.
(b)[2 marks]Calculate the mass of a metal beam of volume 2 m^3 made from (i) aluminium alloy and (ii) mild steel. Give your answers in kilograms.
(c)[1 mark]Explain why mild steel is preferred over high-carbon steel for making bridge structures.
Question 223
5 marks · Easy
Answer and see the solution →Aluminium and steels are widely used metals and alloys in everyday life.
(a)[2 marks]Describe why pure aluminium is rarely used in construction and how adding other elements strengthens it.
(b)[2 marks]Mild steel and high-carbon steel are two important types of steel. State the element that is mainly mixed with iron to make these steels and describe how their properties differ.
(c)[1 mark]State one typical use of high-carbon steel and explain why its properties make it suitable for this use.
Question 224
1 mark · Easy
Answer and see the solution →State what colour phenolphthalein turns in an acidic solution.
Question 225
3 marks · Easy
Answer and see the solution →Classify each solution by its pH.
(a)[1 mark]A solution has a pH of 2. State whether it is strongly acidic, weakly acidic, neutral, weakly alkaline, or strongly alkaline.
(b)[1 mark]A solution has a pH of 9. What type of solution is this according to the pH scale?
(c)[1 mark]A solution has a pH of 7. What type of solution is this?
Question 226
2 marks · Easy
Answer and see the solution →A student tests two solutions with litmus paper. Solution X turns blue litmus red. Solution Y turns red litmus blue. How many solutions are acidic?
Question 227
2 marks · Easy
Answer and see the solution →Explain why a solution with a pH of 5 is not considered strongly acidic. Include information about the pH scale in your answer.
Question 228
3 marks · Easy
Answer and see the solution →Results of adding indicators to three unknown solutions. Solution Litmus (colour) Methyl orange (colour) Phenolphthalein (colour) A red red colourless B blue yellow pink C blue yellow colourless Use the table to answer the following questions about solutions A, B, and C.
(a)[1 mark]Which solution is acidic?
(b)[1 mark]Which solution is alkaline?
(c)[1 mark]Which indicator could you use to distinguish solutions B and C? State the colour it would show for each.
Question 229
1 mark · Easy
Answer and see the solution →State the pH value of a neutral solution.
Question 230
3 marks · Easy
Answer and see the solution →Some students are testing three household substances with universal indicator.
(a)[1 mark]Explain what universal indicator does when added to an aqueous solution.
(b)[1 mark]A solution turns orange with universal indicator. State if this solution is acidic, neutral or alkaline.
(c)[1 mark]Which household substance is likely to give a universal indicator colour of purple? Choose from: vinegar, tap water, sodium bicarbonate solution, bleach.