4-mark practice questions — Cambridge International IGCSE Chemistry (0620)
225 questions · chemistry · View as Markdown
How to answer
4-mark questions are the shortest levels-of-response band. Aim for four scientific ideas, each in its own short sentence.
Sample questions
- Explain the difference between an exothermic reaction and an endothermic reaction, and give one example of each type of …
- Describe how a pure, dry sample of sodium chloride could be prepared by reacting sodium hydroxide solution with dilute h…
- A student investigates the reactivity of four metals: aluminium, iron, platinum, and potassium. Using knowledge of the r…
- Brass is an alloy made from copper and zinc. Compare the properties of brass with those of pure copper, and explain why …
- Compare the arrangement and movement of particles in a solid with those in a gas, and use these differences to explain w…
- Propanoic acid is a carboxylic acid used as a food preservative. Explain why propanoic acid is described as a weak acid,…
- Poly(ethene) is made from ethene by a process called addition polymerisation. Describe what happens to ethene molecules …
- Hydrogen peroxide decomposes into water and oxygen when manganese(IV) oxide is added as a catalyst. A student measures t…