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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?
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?
13. Halides are diatomic molecules, true or 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?