When concentrated sulfuric acid reacts with sodium iodide, the products formed include sulfur, iodine, hydrogen sulfide and sulfur dioxide. Which statement is correct in this case?
- AHydrogen sulfide is the product of a reduction reaction.
- BIodide ions are stronger oxidising agents than sulfate ions.
- CSulfur atoms from the sulfuric acid are both oxidised and reduced.
- DSulfur atoms from the sulfuric acid are oxidised to make sulfur dioxide.