AQA · GCSE · Chemistry

Chemical changes

04.1 · 1 mark Meaning of strong acid What is meant by a ‘strong acid’? 04.2 · 1 mark Meaning of dilute aqueous solution What is meant by ‘dilute aqueous solution’? 04.4 · 1 mark Ionic equation for neutralisation Write the ionic equation for the reaction between an acid and an alkali. 04.6 · 1 mark Universal indicator colour What colour was the solution after the addition of universal indicator? Tick one box. 06.1 · 1 mark Native metals in Earth Name one metal that is found in the Earth as the metal itself. 06.2 · 1 mark Extracting metal Z economically Suggest the most economical method for extracting metal Z from an oxide of metal Z. 06.3 · 1 mark Substance X in electrolysis Name substance X shown in Figure 10. 06.4 · 3 marks Carbon electrodes during electrolysis Explain what happens to the positive carbon electrodes during the extraction of aluminium from aluminium oxide. 06.5 · 2 marks Aluminium reduction half equation Write a half equation for the reaction at the negative electrode in Figure 10.

AQA · GCSE · Chemistry

Quantitative chemistry

04.5 · 1 mark Mole ratio from equation What is the ratio of the number of moles of magnesium carbonate to the number of moles of nitric acid in the reaction? Tick one box. 08.3 · 2 marks Moles in one nanotube Calculate the number of moles of carbon in this nanotube.

AQA · GCSE · Chemistry

Energy changes

04.7 · 2 marks Improving temperature-change method Give two improvements to the method to produce more accurate results. Do not refer to improvements to the apparatus in your answer.

AQA · GCSE · Chemistry

Bonding, structure, and the properties of matter

05.1 · 2 marks Ammonia dot-and-cross diagram Complete the dot and cross diagram for an ammonia molecule. 08.1 · 1 mark Carbon atoms in nanotubes Describe the arrangement of carbon atoms in the nanotube shown in Figure 11. 08.2 · 1 mark Other uses of nanotubes Give one other use of nanotubes. 08.4 · 3 marks Nanotube electrical conductivity Explain why carbon nanotubes can conduct electricity. Refer to bonding between carbon atoms in your answer.

AQA · GCSE · Chemistry

Atomic structure and the periodic table

07.2 · 4 marks Chlorine versus bromine reactivity Explain why chlorine is more reactive than bromine. 07.3 · 2 marks Hydrogen halide boiling trend Describe how the boiling points of the hydrogen halides change as the relative formula mass changes.

AQA · GCSE · Chemistry

Organic chemistry

01.1 · 1 mark Meaning of the term hydrocarbon Define the term ‘hydrocarbon’. 01.2 · 1 mark Using the alkane general formula Determine the formula of the alkane with 10 carbon atoms. 01.3 · 4 marks Fractional distillation of crude oil Explain how crude oil is separated into fractions. Use Figure 1. 01.4 · 1 mark Balancing a cracking reaction Balance the equation for the reaction. 01.5 · 2 marks Testing for an alkene Describe the test for alkenes. Give the result.

AQA · GCSE · Chemistry

The rate and extent of chemical change

02.2 · 3 marks Temperature effects in collision theory Explain the effect of increasing the temperature on the rate of a reaction. Refer to particles and collisions in your answer.