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

> 8 questions · chemistry

## How to answer

Say WHAT happens, in order. No reasoning. Structure: 1. First X. 2. Then Y. 3. Then Z. Assessment Objective: AO1. Every "describe" answer on this spec is marked against exactly this pattern.

## Sample questions

1. [Propanoic acid is a carboxylic acid used as a food preservative. Describe the key properties of carboxylic acids, includ…](https://www.gradenine.co.uk/q/propanoic-acid-is-a-carboxylic-acid-072d6e9e)
2. [A student wants to find the empirical formula of a compound containing only carbon and hydrogen. The compound is found t…](https://www.gradenine.co.uk/q/a-student-wants-to-find-the-2ae02865)
3. [Describe the differences between addition polymerisation and condensation polymerisation, including the types of monomer…](https://www.gradenine.co.uk/q/describe-the-differences-between-addition-polymerisation-3e584a3b)
4. [Methanol, ethanol, propanol and butanol are the first four members of a homologous series of alcohols. Alcohols can be o…](https://www.gradenine.co.uk/q/methanol-ethanol-propanol-and-butanol-are-7c0d27f3)
5. [A student is investigating how the concentration of hydrogen peroxide solution affects the volume of oxygen gas produced…](https://www.gradenine.co.uk/q/a-student-is-investigating-how-the-ac498b5e)
6. [A forensic scientist is analysing an unknown organic liquid found at a crime scene. The scientist suspects the liquid is…](https://www.gradenine.co.uk/q/a-forensic-scientist-is-analysing-an-f3c971c0)
7. [Vinegar contains ethanoic acid, a member of the carboxylic acids homologous series. Describe the key features of carboxy…](https://www.gradenine.co.uk/q/vinegar-contains-ethanoic-acid-a-member-f88ef77e)
8. [A student is carrying out a practical investigation to determine the effect of stirring on the rate of reaction between …](https://www.gradenine.co.uk/q/a-student-is-carrying-out-a-bb8bdb66)

## 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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