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6. What is an acid?

  • A substance that releases OH- ions
  • A substance that releases H+ ions
  • Something with a high pH
  • The opposite of an alkali

7. When you have a strong alkali, what happens?

  • It dissociates in water, releasing OH- ions
  • It dissociates in water, releasing H+ ions
  • nothing

8. In electrolysis, oxidation means?

  • The loss of electrons
  • The gain of electrons
  • A substance turning from liquid to gas

9. Acid + Base -> ?

  • Acid + Base -> Salt + Water
  • Acid + Base -> Salt + Hydroxide

10. If halide ions are present during electrolysis, a halide ion is produced, true or false?

  • True
  • False

11. If a sulphate, nitrate or carbonate is present you get?

  • H+
  • O2
  • A sulphate, nitrate or carbonate ion
  • No change
  • OH-

12. Ammonia is used for fertilisers, true or false?

  • True
  • False

13. Halides are diatomic molecules, true or false?

  • True
  • False

14. What conditions are used in the Haber process?

  • 200 atms, 450 degrees and an iron catalyst
  • 450 atms, 200 degrees and an iron catalyst
  • 450 atms, 200 degrees
  • 400 atms, 250 degrees and a nickel catalyst

15. Why are high temperatures used but low pressures

  • to favour forward exothermic reaction and use less energy
  • to favor forward exothermic reaction and keep costs down
  • to favor forward endothermic reaction and keep costs down
  • to retain a higher yield and keep costs down

16. When a reaction forms a solid it is called a:

  • crystalisation
  • precipitation
  • solid

17. You can increase the rate of reaction by:

  • by decreasing temp, but increasing surface area and concentration
  • by using a catalyst
  • by increaing temp, surface area and concentration and using a catalyst
  • increasing temp, surface area and concentration

18. The activation energy is the minimum amount of energy required for a reaction to take place, true or false?

  • True
  • False