Which of the following statements about acids and bases are correct? 1. When an acid reacts with a metal, hydrogen is released. 2. When a base reacts with an ammonium salt, ammonia is given off. 3. When an acid reacts with a carbonate, carbon dioxide is released. 4. With methyl orange, alkaline solutions appear orange.
- A1, 2 and 3
- B1, 2 and 4
- C1, 3 and 4
- D2, 3 and 4