Concentrated sodium chloride solution (brine) undergoes electrolysis, which produces a gaseous product at the positive electrode (anode).
A student collects a sample of this gas and tests it by inserting a piece of damp blue litmus paper into the test tube.
State what would be observed.
Practise Edexcel GCSE Chemistry Electrolytic processes with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.