The reactions of element M below are shown. When element M is burnt, it forms the oxide of M. This oxide is then dissolved in water to give a solution. On adding blue litmus, the solution turns red. When the oxide is added to purple acidified potassium manganate(VII), the solution becomes colourless. What is the identity of element M?
- Acarbon
- Biron
- Cmagnesium
- Dsulfur