# "Describe" questions — Cambridge International IGCSE Chemistry (0620)

> 56 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. [Describe how a pure, dry sample of sodium chloride could be prepared by reacting sodium hydroxide solution with dilute h…](https://www.gradenine.co.uk/q/describe-how-a-pure-dry-sample-0318b86e)
2. [A student investigates the reactivity of four metals: aluminium, iron, platinum, and potassium. Using knowledge of the r…](https://www.gradenine.co.uk/q/a-student-investigates-the-reactivity-of-0427a3f7)
3. [Poly(ethene) is made from ethene by a process called addition polymerisation. Describe what happens to ethene molecules …](https://www.gradenine.co.uk/q/poly-ethene-is-made-from-ethene-by-060537e2)
4. [Describe how paper chromatography can be used to find out whether a sample of ink contains a mixture of dyes or a single…](https://www.gradenine.co.uk/q/describe-how-paper-chromatography-can-be-076b9043)
5. [Describe what is observed when dilute hydrochloric acid is added to sodium carbonate, and state two other types of subst…](https://www.gradenine.co.uk/q/describe-what-is-observed-when-dilute-0a12f037)
6. [Iron rusts when it is exposed to both oxygen and water. Describe what happens to the iron atoms during rusting in terms …](https://www.gradenine.co.uk/q/iron-rusts-when-it-is-exposed-125c9d09)
7. [A student has a mixture of sand and salt dissolved in water. Describe how the student could obtain a pure, dry sample of…](https://www.gradenine.co.uk/q/a-student-has-a-mixture-of-19f05aff)
8. [Copper sulfate is a compound. Describe four ways in which a compound differs from a mixture.](https://www.gradenine.co.uk/q/copper-sulfate-is-a-compound-describe-1d3ec6d1)

## Related

- [Cambridge International IGCSE Chemistry (0620) revision notes](https://www.gradenine.co.uk/learn/cambridge-international-igcse-chemistry-0620)
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