Answer:
Option (a) is the correct response. The reaction of potassium dichromate with sulphur dioxide is characterised by a colour shift. By passing sulphur dioxide through acidified potassium dichromate, the colour changes from orange to green.
The chemical reaction between the two substances is characterised by a change in colour from orange to green. These two substances are most likely to be: (a) Potassium dichromate solution and sulphur dioxide (b) Potassium permanganate solution and sulphur dioxide (c) Potassium permanganate solution and lemon juice (d) Potassium dichromate solution and carbon dioxide
The chemical reaction between the two substances is characterised by a change in colour from orange to green. These two substances are most likely to be: (a) Potassium dichromate solution and sulphur dioxide (b) Potassium permanganate solution and sulphur dioxide (c) Potassium permanganate solution and lemon juice (d) Potassium dichromate solution and carbon dioxide