The observations from tests on solid S and on its aqueous solution are shown. When solid S is heated, a brown gas is evolved along with a gas that relights a glowing splint. With aqueous sodium hydroxide: a white precipitate is formed, which dissolves in excess to give a colourless solution. With aqueous ammonia: a white precipitate is formed, which dissolves in excess to give a colourless solution. Identify S.
- Aaluminium nitrate
- Baluminium sulfate
- Czinc sulfate
- Dzinc nitrate