Q.1
Plants need nitrogen to grow. How do we ensure that plants get the nitrogen that they need?
  • Increase the amount of nitrogen in the air around the plants
  • Increase the amount of nitrogen in the soil around the plants' roots
  • Increase the amount of nitrates in the soil around the plants' roots
  • Increase the amount of nitrates in the air around the plants
Q.2
Why can't plants use the nitrogen in the air?
  • It's unreactive
  • It can't get into their leaves
  • It doesn't dissolve in water
  • It can't get into their roots
Q.3
What is the name of the industrial process which turns nitrogen and hydrogen into ammonia?
  • Nitrogen process
  • Contact process
  • Haber process
  • Ammonia process
Q.4
The raw materials for the Haber process are...
  • nitrogen from the air hydrogen from water
  • nitrogen from the sea hydrogen from natural gas
  • nitrogen from ammonia hydrogen from the air
  • nitrogen from the air hydrogen from natural gas
Q.5
Name the catalyst used in the Haber process.
  • Platinum
  • Iron
  • Vanadium (V) oxide
  • Nickel catalyst
Q.6
Pick the temperature at which the Haber process takes place most efficiently.
  • 20oC
  • 200oC
  • 450oC
  • 900oC
Q.7
Pick the pressure at which the Haber process is carried out.
  • 200 atmospheres
  • 100 atmospheres
  • 50 atmospheres
  • 1 atmosphere
Q.8
The reaction that produces ammonia is reversible. What does this mean?
  • The ammonia breaks down again into hydrogen and nitrogen
  • The ammonia doesn't break down into hydrogen and nitrogen
  • Ammonia is produced but then it reproduces itself
  • The hydrogen and nitrogen never stop reacting
Q.9
To reduce the breaking down of ammonia into nitrogen and hydrogen, what is done?
  • Water is added to the ammonia
  • The nitrogen and hydrogen are forced to stop reacting
  • The ammonia is added to the hydrogen and nitrogen
  • The ammonia is cooled and removed
Q.10
Pick the correct equation for the Haber process.
  • N2 + 3H2 → 2NH3
  • N2 + 3H2 → NH3
  • N2 + 3H2 ⇌ 2NH3
  • N2 + H2 ⇌ NH3
0 h : 0 m : 1 s