# "Explain" questions — OCR A-Level Chemistry A (H432)

> 67 questions · chemistry

## How to answer

WHAT + WHY. Every point paired with a because. Structure: X happens because Y. This causes Z because … Assessment Objective: AO2. Every "explain" answer on this spec is marked against exactly this pattern.

## Sample questions

1. [Ethanol can be oxidised to form a carboxylic acid. Explain what is meant by the term carboxylic acid, name the carboxyli…](https://www.gradenine.co.uk/q/ethanol-can-be-oxidised-to-form-048c7fba)
2. [Methanol, ethanol and propanol are all members of the alcohol homologous series. A chemist is investigating the combusti…](https://www.gradenine.co.uk/q/methanol-ethanol-and-propanol-are-all-0fe65056)
3. [Hand warmers are single-use packets used by hikers in cold weather. When a hand warmer is activated, a chemical reaction…](https://www.gradenine.co.uk/q/hand-warmers-are-single-use-packets-used-12f28018)
4. [Propan-1-ol can be converted into 1-chloropropane, a haloalkane, in a substitution reaction. Explain how the functional …](https://www.gradenine.co.uk/q/propan-1-ol-can-be-converted-into-1-chloropropane-14a4ba22)
5. [Buckminsterfullerene (C₆₀) is a fullerene used in medical drug delivery systems. Explain why C₆₀ has a low melting point…](https://www.gradenine.co.uk/q/buckminsterfullerene-c-is-a-fullerene-used-169d6851)
6. [A student is making bread at home. Yeast is added to the dough mixture to help it rise. The student notices that the dou…](https://www.gradenine.co.uk/q/a-student-is-making-bread-at-1e5cf909)
7. [A sports clothing company is developing a new fabric using condensation polymerisation. The polymer chain contains amide…](https://www.gradenine.co.uk/q/a-sports-clothing-company-is-developing-1ed48670)
8. [Iron is an element. Steel is an alloy made mostly from iron, with small amounts of carbon and other metals added. Explai…](https://www.gradenine.co.uk/q/iron-is-an-element-steel-is-20419ae7)

## Related

- [OCR A-Level Chemistry A (H432) revision notes](https://www.gradenine.co.uk/learn/ocr-a-level-chemistry-a-h432)
- [OCR A-Level Chemistry A (H432) past papers](https://www.gradenine.co.uk/past-papers/ocr-a-level-chemistry-a-h432)
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