| 1. | Ammonium sulphate | 2. | Potassium chromate | 
| 3. | Ammonium oxalate | 4. | Ammonium nitrate | 
| A. | \(\mathrm{Cl^-}\) gives pale yellow precipitate. | 
| B. | \(\mathrm{Br^-}\) gives pale yellow precipitate which is partially soluble in \(\mathrm{NH_4OH.}\) | 
| C. | \(\mathrm{I^-}\) gives yellow precipitate which is insoluble in \(\mathrm{NH_4OH.}\) | 
| D. | \(\mathrm{Cl^-}\) gives white precipitate which is insoluble in \(\mathrm{NH_4OH.}\) | 
| E. | \(\mathrm{I^-}\) gives purple violet gas. | 
| 1. | B and C only | 2. | A and B only | 
| 3. | A and E only | 4. | D and E only | 
| 1. | B, C, A, D, E | 2. | E, C, D, B, A | 
| 3. | E, A, B, C, D | 4. | B, A, D, C, E |