Chemistry · May / June 2016 · Paper 11 · Question 22

Gaseous compound X is an oxidising agent. X is bubbled through separate solutions of aqueous potassium iodide and acidified potassium manganate(VII). [diagram: X bubbled through aqueous potassium iodide; X bubbled through acidified potassium manganate(VII)] Which row shows the colour changes when X is bubbled through these two solutions?

1. Abrown to colourless | no change
2. Bbrown to colourless | purple to colourless
3. Ccolourless to brown | no change
4. Dcolourless to brown | purple to colourless

As printed in the paper