(Not Double Science - Chemistry GCSE Only) |
1. The chemical test for ammonia gas is..
- A. it turns damp red litmus paper blue
- B. it turns damp blue litmus paper red
- C. it bleaches damp litmus paper
- D. it has a very pungent smell
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| 2. Fireworks have coloured flames due to the presence of metal ions. |
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A blue-green flame is produced by the presence of ..
- A. calcium ions
- B. copper(II) ions
- C. potassium ions
- D. lithium ions
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| 3.A student tested a solution for the presence of iodide ions. The test was positive.
The solutions the student added and the observation made were..
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Substances added |
Observation made |
| A |
Nitric acid and silver nitrate |
White precipitate |
| B |
Nitric acid and silver nitrate |
Yellow precipitate |
| C |
Hydrochloric acid and silver nitrate |
White precipitate |
| D |
Hydrochloric acid and silver nitrate |
Yellow precipitate |
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4. A white solid X was tested and gave the following results:
| Test |
Result |
| Flame test |
orange-red flame |
| Dilute hydrochloric acid added |
Bubbles seen |
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The name of solid X is..
- A. calcium sulfate
- B. calcium carbonate
- C. lithium sulfate
- D. lithium carbonate
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5. Which is the correct test for ammonium ions?
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Warm the sample gently with .. |
Test any gas evolved with.. |
| A |
Sodium hydroxide solution |
Damp blue litmus paper |
| B |
Sodium hydroxide solution |
Damp red litmus paper |
| C |
Dilute hydrochloric acid |
Damp blue litmus paper |
| D |
Dilute hydrochloric acid |
Damp red litmus paper |
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Q6-7:
A yellow solution Y was tested and gave the following results:
| Test |
Result |
| Add sodium hydroxide solution |
brown precipitate |
| Add dilute hydrochloric acid then barium chloride solution |
white precipitate |
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6. The name of the brown precipitate formed is..
- A. iron(II)hydroxide
- B. iron(III)hydroxide
- C. iron(II)sulfate
- D. iron(III)sulfate
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7. The formula of the white precipitate formed is..
- A. FeCl2
- B. BaCO3
- C. BaSO4
- D. BaCl2
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8. A few drops of sodium hydroxide solution were added to a colourless solution and a white precipitate was seen to form.
The precipitate remained unchanged when excess sodium hydroxide solution was added.
Identify the metal ion present in the solution.
- A. calcium
- B. lithium
- C. potassium
- D. aluminium
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9. A student is given an unknown solution. Which two of the following tests would provide evidence that the solution is copper(II)sulfate?
| 1. Adding hydrochloric acid |
| 2. Adding sodium hydroxide solution |
| 3. Adding dilute nitric acid then silver nitrate |
| 4. Adding dilute hydrochloric acid then barium chloride |
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- A. 1 and 3
- B. 1 and 4
- C. 2 and 3
- D. 2 and 4
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10. Ammonia gas is produced when a mixture of ammonium chloride and substance X is heated. What is substance X?
- A. silver nitrate
- B. sodium hydroxide
- C. barium chloride
- D. hydrochloric acid
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