"Explain" questions — OCR A-Level Chemistry B: Salters (H433)
103 questions · chemistry · View as Markdown
How to answer
WHAT + WHY. Every point paired with a because. Structure: X happens because Y. This causes Z because … Assessment Objective: AO2. Every "explain" answer on this spec is marked against exactly this pattern.
Sample questions
- Dmitri Mendeleev arranged elements into a periodic table in 1869. The modern periodic table is arranged in order of atom…
- Explain why the majority of plastics used in everyday products are difficult to dispose of responsibly, and describe one…
- A doctor is explaining to a medical student how the human body is made from a small number of chemical elements. The doc…
- A fashion designer is developing a new range of clothing and wants to use natural dyes instead of synthetic dyes. Explai…
- Propan-1-ol and 1-chloropropane are two organic compounds. Explain how a chemist could distinguish between propan-1-ol a…
- Explain why the oceans contain dissolved salts and describe how the concentration of these dissolved salts affects marin…
- Explain why elements in the same group of the periodic table have similar chemical properties, and describe how the reac…
- A student uses a reaction profile to compare two reactions: an uncatalysed decomposition of hydrogen peroxide and the sa…