"Explain and describe" questions — AQA A-Level Chemistry (7405)
6 questions · chemistry · View as Markdown
How to answer
"explain and describe" questions from AQA A-Level Chemistry (7405). Read the rubric carefully — the marking points cluster into scientific ideas rather than free-form prose.
Sample questions
- Iron and copper are both transition metals. Explain why iron is described as a transition metal and describe two ways in…
- Butene is an alkene with the molecular formula C₄H₈. Explain why butene belongs to the alkenes homologous series and des…
- Alkanes are used as fuels. Explain why cracking is carried out on long-chain alkanes and describe what happens during ca…
- Combustion of fuels is an exothermic process. Explain what the term exothermic means and describe how the energy profile…
- A student investigates the energy change when zinc powder is added to copper sulfate solution. The temperature of the mi…
- Ethene is produced when long-chain hydrocarbons from crude oil are cracked. Explain why cracking is carried out in indus…