Acid rain remains an environmental issue. Which of the following statements about acid rain are correct? 1 Acid rain is produced when oxides of nitrogen or oxides of sulfur react with water in the atmosphere. 2 Acid rain leads to a rise in the concentration of heavy metal ions in water courses. 3 Nitrogen dioxide will catalyse the formation of $\text{SO}_3$ from $\text{SO}_2$ in the atmosphere.
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct