Question Constellation Sign up for free AQA · GCSE · Chemistry
Using resources
06.2 · 2 marks Aluminium alloy corrosion resistance Explain why aluminium alloy bicycle frames do not need protection from corrosion. 06.3 · 1 mark Bicycle chain rust prevention Bicycle chains are made from an alloy of iron. Bicycle chains rust without protection. Paint is not used to protect bicycle... 06.4 · 2 marks Composite material component roles Bicycle frames can also be made from a composite of carbon fibres embedded in a polymer resin. What description is given in this... 08.7 · 1 mark Heat-softening polymer terminology What word is used to describe polymers which melt when heated? 03.3 · 6 marks Water treatment and purification processes Explain what happens to water in Process A and in Process B in Figure 3. Do not refer to use of water in the home. 06.1 · 6 marks Bicycle frame material evaluation Evaluate the use of aluminium alloy and of bamboo for making bicycle frames. Use Table 3.
AQA · GCSE · Chemistry
Chemical analysis
AQA · GCSE · Chemistry
The rate and extent of chemical change
07.2 · 1 mark Forward reaction energy profile Which statement about the forward reaction is correct? Use Figure 7. Tick one box. 07.3 · 2 marks Pressure effect on equilibrium yield Explain why the percentage yield of sulfur trioxide in this reaction is greater if the pressure is higher. 07.4 · 2 marks Industrial equilibrium pressure compromise In industry, the reaction is done at 450 °C and atmospheric pressure. Under these conditions the yield of sulfur trioxide is 86%... 09.1 · 2 marks Gas collection volume discrepancy Explain why the volume of hydrogen collected in the 50 cm³ measuring cylinder is less than the volume of hydrogen produced. 09.3 · 5 marks Tangent rate calculation Determine the rate of reaction at 45 seconds. You should draw a tangent on Figure 12. Give your answer in standard form. 09.4 · 2 marks Concentration effect graph sketch Figure 13 shows the results for 0.40 mol/dm³ sulfuric acid. The student repeated the experiment using 0.20 mol/dm³ sulfuric acid... 09.5 · 3 marks Temperature effect on reaction rate Explain how increasing the temperature would affect the rate of reaction between zinc and sulfuric acid.
AQA · GCSE · Chemistry
Atomic structure and the periodic table
AQA · GCSE · Chemistry
Organic chemistry
08.1 · 1 mark Locating the alkene functional group Draw a circle around the alkene functional group on Figure 8. 08.2 · 2 marks Bromine water alkene test Describe what will be seen when compound A is shaken with bromine water. 08.3 · 1 mark Locating the ester functional group Figure 9 is a repeat of Figure 8. Draw a circle around the ester functional group on Figure 9. 08.4 · 3 marks Compound combustion equation balancing Compound A has the formula C₄H₆O₂. Compound A is flammable. Write a balanced equation for the complete combustion of compound A. 08.5 · 2 marks Polymer formation displayed equation Many molecules of compound A join together to form polymer B. Complete the displayed formula equation which represents this... 08.6 · 1 mark Polymerisation reaction classification What type of polymer is polymer B? Tick one box.
AQA · GCSE · Chemistry
Bonding, structure, and the properties of matter
AQA · GCSE · Chemistry
Quantitative chemistry
09.2 · 4 marks Hydrogen amount calculation from graph Determine the number of moles of hydrogen collected between 40 seconds and 100 seconds. The volume of one mole of any gas at... 02.4 · 3 marks Solution concentration calculation A solution of lithium sulfate contains 0.30 g of lithium sulfate in 25 cm3. Calculate the concentration of lithium sulfate in...