AQAGCSEChemistryFoundation1 mark
GCSE revision question
Question context
Potable water can be produced from fresh water sources by filtration and chlorination, or from sea water by desalination. Desalination is more expensive due to the energy needed to remove salt.
State one technique used to make fresh water safe to drink.
Show answer, mark scheme and Mentor explanation
Answer and mark-scheme guidance
MP1: One mark for any one of: filtration, chlorination, boiling (or other simple method to make water safe).
Mentor — AI Tutor
Can you spot the exact one-word answer the mark scheme will reward?
This 1-mark question is testing whether you can state one valid technique used to make fresh water safe to drink. The mark scheme accepts any one correct method, including filtration, chlorination or boiling. Because it is a short-answer question, you only need one accepted technique to earn the mark.
Quick takeaway: For the mark, give one accepted method such as filtration, chlorination or boiling.