The table gives statements about some properties of halogens and their compounds, together with explanations for those properties. Which row gives a correct statement of the property and a correct explanation for that statement?
- Astatement: iodine is a solid at room temperature; explanation: the I-I bond strength is high
- Bstatement: the decomposition of hydrogen iodide is more endothermic than the decomposition of hydrogen chloride; explanation: chlorine is more reactive than iodine
- Cstatement: when chlorine is bubbled into aqueous potassium iodide, a purple solution is seen; explanation: chlorine is a stronger oxidising agent than iodine
- Dstatement: when concentrated sulfuric acid is added to solid potassium iodide, a purple vapour is seen; explanation: iodide ions are being oxidised to iodine by the sulfuric acid