A-LevelChemistryElectrochemistryFeb/Mar 2021Paper 1 Q171 Mark
When concentrated sulfuric acid reacts with sodium iodide the products include sulfur, iodine, hydrogen sulfide and sulfur dioxide. Which statement is correct?
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.
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The correct answer is A. This question tests the candidate's understanding of electrochemistry within the Chemistrysyllabus. The examiner's mark scheme requires...
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