KS4CI-LP3 - Chemical Analysis

6. What colour is observed when Sodium ions are present in a compound are placed into a flame?

• a) Bright Red
• b) Green
• c) Yellow/Orange
• d) Lilac/pink

7. What colour is observed when Copper ions are present in a compound are placed into a flame?

• a) Bright Red
• b) Green
• c) Yellow/Orange
• d) Lilac/pink

8. What colour is observed when Potassium ions are present in a compound are placed into a flame?

• a) Apple Green
• b) Brick Red
• c) Yellow/Orange
• d) Lilac/pink

13. What chemicals are required to test for the presence of Sulphate ions in an unknown solution?

• a) Barium Nitrate + Hydrochloric acid
• b) Dilute Nitric acid + Silver Nitrate
• c) Sodium Hydroxide/Ammonia solution
• d) Hydrochloric acid and Limewater

17. What chemicals are required to test for the presence of Ammonium ions in an unknown solution?

• a) Barium Nitrate + Hydrochloric acid
• b) Dilute Nitric acid + Silver Nitrate
• c) Sodium Hydroxide + damp litmus/indicator paper
• d) Hydrochloric acid + damp litmus/indicator paper

19. Dilute Nitric acid + Silver Nitrate is added to a solution and it gives a White precipitate. What ion is present?

• a) Fluoride, F-
• b) Chloride, Cl-
• c) Bromide, Br-
• d) Iodide, I-

21. Dilute Nitric acid + Silver Nitrate is added to a solution and it gives a Yellow precipitate. What ion is present?

• a) Fluoride, F-
• b) Chloride, Cl-
• c) Bromide, Br-
• d) Iodide, I-

22. Dilute NaOH is added to a solution and a Green Precipitate is formed. What ion is present?

• a) Copper(II), Cu2+
• b) Ammonium, NH4 +
• c) Iron(II), Fe2+
• d) Iron(III), Fe3+

24. Dilute NaOH is added to a solution and a Brown Precipitate is formed. What ion is present?

• a) Copper(II), Cu2+
• b) Ammonium, NH4 +
• c) Iron(II), Fe2+
• d) Iron(III), Fe3+

26. Dilute HCl and Barium Chloride are added to a solution and a white precipitate is formed. What ion is present?

• a) Ammonium, NH4 +
• b) Carbonate, CO3 2-
• c) Sulphite, SO3 2-
• d) Sulphate, SO4 2-