Acidified potassium manganate(VII) is used as the test reagent. When this is added to an aqueous solution of compound X, the colour of the test reagent changes from .....1..... . This colour change indicates that X is .....2..... . Which words correctly fill blanks 1 and 2?
- Acolourless to purple; oxidised
- Bcolourless to purple; reduced
- Cpurple to colourless; oxidised
- Dpurple to colourless; reduced