# 5-mark practice questions — Edexcel A-Level Chemistry (9CH0)

> 194 questions · chemistry

## How to answer

5-mark questions typically award marks for structured argument: two ideas + linked because + specific example + conclusion.

## Sample questions

1. [Ammonia (NH₃) is a covalently bonded molecule with a non-linear, trigonal pyramidal shape. Explain why ammonia is descri…](https://www.gradenine.co.uk/q/ammonia-nh-is-a-covalently-bonded-001ee9ca)
2. [A student investigates the decomposition of hydrogen peroxide solution at two different temperatures. At the higher temp…](https://www.gradenine.co.uk/q/a-student-investigates-the-decomposition-of-0084619e)
3. [Nylon-6,6 is a synthetic polyamide made from two monomers: hexane-1,6-diamine (a diamine) and hexanedioic acid (a dicarb…](https://www.gradenine.co.uk/q/nylon-6-6-is-a-synthetic-polyamide-made-011a9196)
4. [Polymers can be divided into two main types based on how they are formed: addition polymers and condensation polymers. E…](https://www.gradenine.co.uk/q/polymers-can-be-divided-into-two-018e0410)
5. [A conservation scientist wants to identify the chemical compounds present in a sample of ancient plant resin found at an…](https://www.gradenine.co.uk/q/a-conservation-scientist-wants-to-identify-036ccbc1)
6. [Mass spectrometry and infrared spectroscopy are two modern analytical techniques used to identify unknown compounds. Exp…](https://www.gradenine.co.uk/q/mass-spectrometry-and-infrared-spectroscopy-are-041bfa6d)
7. [Explain why the lattice enthalpy of magnesium oxide is much more negative than the lattice enthalpy of sodium chloride.](https://www.gradenine.co.uk/q/explain-why-the-lattice-enthalpy-of-055812bd)
8. [A forensic scientist analyses a white powder found at a crime scene. The scientist dissolves the powder in distilled wat…](https://www.gradenine.co.uk/q/a-forensic-scientist-analyses-a-white-07e64967)

## Related

- [Edexcel A-Level Chemistry (9CH0) revision notes](https://www.gradenine.co.uk/learn/edexcel-a-level-chemistry-9ch0)
- [Edexcel A-Level Chemistry (9CH0) past papers](https://www.gradenine.co.uk/past-papers/edexcel-a-level-chemistry-9ch0)
- [Practise with AI marking (free)](https://www.gradenine.co.uk/start)