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6. When a reversible reaction is at equilibrium, how does the rate of the forward reaction compare with the rate of the reverse reaction?
- The forward reaction and and reverse reaction occur simultaneously at the same rate.
- The forward reaction occurs at a faster rate than the reverse reaction.
- The reverse reaction occurs at a faster rate than the forward reaction.
- It depends on the reaction conditions.
7. What should the flame colour be in a flame test for barium?
8. What solution is used to test for sulfate ions?
- Magnesium chloride
- Barium chloride
- Strontium chloride
- Calcium chloride
9. Which of these can chemical analysis be useful for?
- Medicinal use.
- Forensic science.
- All three.
- River pollution.
10. Which compound group reacts with dilute acid to form carbon dioxide?
- Nitrates
- Halides
- Carbonates
- Sulfates
11. How do we test for halide ions?
- Perform a flame test.
- Add dilute nitric acid followed by silver nitrate solution and see if a precipitate forms.
- Add dilute hydrochloric acid followed by barium chloride to see if a white precipitate forms.
- Add dilute sodium hydroxide solution to see if a precipitate forms.
12. I have a sample of hydrochloric acid of concentration 73g/dm3. What is the concentration in mol/dm3?
- 1mol/dm3.
- 1.5mol/dm3.
- 2 mol/dm3.
- 3mol/dm3.
13. Which of these indicators is NOT used in titration?
- Litmus
- Phenolphthalein
- Universal indicator
- Methyl orange
14. What costs are a factor of making ammonia by the Haber process?
- Extraction of materials, a catalyst, energy, equipment, wages.
- Raw materials, energy, wages.
- Extraction of materials, energy.
- Wages, a catalyst, equipment.
15. Which of the following is correct for all of the named precipitate reactions between sodium hydroxide and the metals?
- Aluminium = white, Magnesium = white, Copper (II) = blue, Iron (II) = green, Iron (III) = brown
- Aluminium = white, Magnesium = white, Copper (II) = green, Iron (II) = green, Iron (III) = brown
- Aluminium = white, Magnesium = white, Copper (II) = blue, Iron (II) = brown, Iron (III) = yellow
- Aluminium = silver, Magnesium = white, Copper (II) = blue, Iron (II) = red, Iron (III) = brown