Question Constellation Sign up for free AQA · GCSE · Chemistry
The rate and extent of chemical change
02.4 · 1 mark Biological catalyst terminology What are catalysts in biological systems called? 05.2 · 1 mark Concentration and equilibrium position The concentration of oxygen is increased. What is the effect on the position of the equilibrium? Tick one box. 05.3 · 1 mark Pressure and equilibrium position The pressure is decreased. What is the effect on the position of the equilibrium? Tick one box. 05.5 · 2 marks Catalysts and equilibrium position A catalyst is used in the reaction. Suggest what effect the catalyst has on the position of the equilibrium. Give one reason for... 05.6 · 3 marks Recognising equilibrium on reaction graphs Determine the time taken for the reaction to reach equilibrium. Explain your answer. Use Figure 5. 05.7 · 4 marks Instantaneous reaction rate from a graph Determine the rate of reaction at 60 seconds.
AQA · GCSE · Chemistry
Chemistry of the atmosphere
03.2 · 2 marks Sulfur dioxide from transport fuels Suggest how sulfur dioxide can be produced by transport. 03.3 · 2 marks Problems caused by sulfur dioxide Give two problems caused by sulfur dioxide as an atmospheric pollutant. 03.4 · 2 marks Carbon monoxide from transport fuels Describe how carbon monoxide can be produced by transport.
AQA · GCSE · Chemistry
Catalytic converters
AQA · GCSE · Chemistry
Chemical analysis
04.1 · 2 marks Red dye movement in chromatography Explain why the red colour did not move from the start line. 04.3 · 1 mark Hidden colours in a chromatogram Suggest one reason why only three colours were visible on the chromatogram. 04.4 · 1 mark Improving chromatography colour separation Suggest how the student could use chromatography to show there were four colours in the printer ink.
AQA · GCSE · Chemistry
Energy changes
AQA · GCSE · Chemistry
Using resources
06.1 · 1 mark Distillation for potable water Give one disadvantage of using distillation to produce potable water. 06.2 · 2 marks Desalination methods for potable water Describe one other method to produce potable water from sea water. 06.4 · 2 marks Sodium chloride percentage mass calculation Calculate the mass of sodium chloride dissolved in the 100 cm³ sample of sea water. 06.5 · 2 marks Extracting copper from leachate Give two methods that can be used to extract copper from these leachate solutions. 06.6 · 3 marks Recovering compounds after phytomining Describe how the metal compounds are obtained from the plants. 06.7 · 3 marks Phytomining area calculation Determine the area required to produce 750 kg of nickel. Give your answer in m².