"Describe and explain" questions — Pearson Edexcel International GCSE Chemistry (4CH1)
8 questions · chemistry · View as Markdown
How to answer
"describe and explain" questions from Pearson Edexcel International GCSE Chemistry (4CH1). Read the rubric carefully — the marking points cluster into scientific ideas rather than free-form prose.
Sample questions
- Chlorine, bromine and iodine are all halogens in Group 7 of the periodic table. Describe and explain the trend in reacti…
- Ethene undergoes an addition reaction with bromine water. Describe what is observed when ethene is bubbled through bromi…
- Crude oil is a finite resource that is separated into useful fractions by fractional distillation. Describe how fraction…
- Graphite and diamond are both giant covalent structures made entirely of carbon atoms, yet they have very different prop…
- Addition polymerisation is used to make poly(ethene) from ethene monomers. Describe the process of addition polymerisati…
- Copper is a metal used to make electrical wiring. It has a giant metallic structure consisting of a lattice of positive …
- Describe the trend in reactivity of the alkali metals as you go down Group 1, and explain this trend in terms of atomic …
- Describe the natural greenhouse effect and explain why an increase in the concentration of greenhouse gases in the atmos…