Which statement correctly describes the trend in the reducing ability of halide ions down Group 7, and identifies the reduction products of concentrated sulfuric acid (H2SO4\text{H}_2\text{SO}_4H2SO4) when it reacts with solid potassium iodide (KI\text{KI}KI)?
Reducing ability decreases down the group, and the only reduction product is SO2\text{SO}_2SO2.
Reducing ability decreases down the group, and the reduction products include SO2\text{SO}_2SO2, S\text{S}S, and H2S\text{H}_2\text{S}H2S.
Reducing ability increases down the group, and the only reduction product is SO2\text{SO}_2SO2.
Reducing ability increases down the group, and the reduction products include SO2\text{SO}_2SO2, S\text{S}S, and H2S\text{H}_2\text{S}H2S.
Practise Edexcel GCSE Chemistry Group 7 with exam-style questions for Foundation and Higher tier. 87 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.