Chemistry · May / June 2020 · Paper 11 · Question 4

Aluminium chloride is dissolved in water and the resulting solution is divided between three test-tubes. Which row gives the reagents for three tests which could be used to confirm the presence of aluminium chloride?

1. Atest-tube 1: aqueous sodium hydroxide; test-tube 2: aqueous ammonia; test-tube 3: dilute hydrochloric acid and aqueous silver nitrate
2. Btest-tube 1: aqueous sodium hydroxide; test-tube 2: dilute nitric acid and aqueous silver nitrate; test-tube 3: dilute hydrochloric acid
3. Ctest-tube 1: aqueous ammonia; test-tube 2: dilute nitric acid and aqueous silver nitrate; test-tube 3: nitric acid and barium nitrate
4. Dtest-tube 1: aqueous sodium hydroxide; test-tube 2: aqueous ammonia; test-tube 3: dilute nitric acid and aqueous silver nitrate

As printed in the paper