# "State and explain" questions — Cambridge International IGCSE Chemistry (0620)

> 13 questions · chemistry

## How to answer

"state and explain" questions from Cambridge International IGCSE Chemistry (0620). Read the rubric carefully — the marking points cluster into scientific ideas rather than free-form prose.

## Sample questions

1. [Butane, butene and butanol are organic compounds. State the functional group present in butanol and explain why butane a…](https://www.gradenine.co.uk/q/butane-butene-and-butanol-are-organic-17e754ad)
2. [State and explain two reasons why steel (an alloy of iron) is used to make bridges rather than pure iron.](https://www.gradenine.co.uk/q/state-and-explain-two-reasons-why-20e97737)
3. [Copper pipes are widely used in plumbing systems to carry hot and cold water. State and explain four properties of coppe…](https://www.gradenine.co.uk/q/copper-pipes-are-widely-used-in-21da36f8)
4. [A student is studying two organic compounds: ethanol and ethanoic acid. State the functional group present in each compo…](https://www.gradenine.co.uk/q/a-student-is-studying-two-organic-2c237b4e)
5. [Ammonia has the molecular formula NH₃. State the meaning of this molecular formula and explain why the empirical formula…](https://www.gradenine.co.uk/q/ammonia-has-the-molecular-formula-nh-336d3b53)
6. [Methanol and ethanol are both members of the alcohol homologous series. State two structural features that all alcohols …](https://www.gradenine.co.uk/q/methanol-and-ethanol-are-both-members-36b585bd)
7. [Nylon is an addition polymer / condensation polymer used to make ropes and clothing fibres. State the type of polymerisa…](https://www.gradenine.co.uk/q/nylon-is-an-addition-polymer-50a2357d)
8. [Methane is the main hydrocarbon in natural gas and is used as a fuel in domestic boilers. State the products formed when…](https://www.gradenine.co.uk/q/methane-is-the-main-hydrocarbon-in-6d2a2d0b)

## Related

- [Cambridge International IGCSE Chemistry (0620) revision notes](https://www.gradenine.co.uk/learn/cambridge-international-igcse-chemistry-0620)
- [Cambridge International IGCSE Chemistry (0620) past papers](https://www.gradenine.co.uk/past-papers/cambridge-international-igcse-chemistry-0620)
- [Practise with AI marking (free)](https://www.gradenine.co.uk/start)