"Explain and describe" questions — WJEC A-Level Chemistry (Wales)
6 questions · chemistry · View as Markdown
How to answer
"explain and describe" questions from WJEC A-Level Chemistry (Wales). Read the rubric carefully — the marking points cluster into scientific ideas rather than free-form prose.
Sample questions
- A pharmaceutical company makes two products: pure aspirin tablets and a cold-relief formulation. Explain why only the pu…
- Methanol and ethanol are both alcohols. Explain why both of these substances are classified as alcohols and describe two…
- A farmer buys a liquid weedkiller product from a garden centre. The label states that it contains several different acti…
- Ethanol (C₂H₅OH) is an organic compound found in alcoholic drinks and is also used as a fuel. Explain why ethanol is cla…
- Propanol (C₃H₇OH) is an alcohol used as a solvent and in hand sanitisers. Explain why propanol is classified as an organ…
- A student wants to separate a mixture of two liquids, ethanol and water, to obtain a sample of pure ethanol. Explain why…