Skip to content
MathsGenie logo
Open app

Course home

  1. A Level
  3. Chemistry AQA
  5. Question bank

Transition metals (A-level only)

EasyMediumHard
123456789101112131415161718192021222324252627282930313233
Question 33
1.

Explain how nitrogen monoxide (NO\text{NO}NO) is formed in aviation gas turbine (jet) engines.

[2]
2.

State one environmental or health hazard associated with the emission of oxides of nitrogen.

[1]
3.

Industrial exhaust cleanup systems utilize ammonia, NH3\text{NH}_3NH3​, to reduce emissions of nitrogen dioxide, NO2\text{NO}_2NO2​. In the presence of a catalyst, ammonia reacts with nitrogen dioxide to form nitrogen gas and water vapor.

  • Give the oxidation state of nitrogen in each of NO2\text{NO}_2NO2​, NH3\text{NH}_3NH3​, and N2\text{N}_2N2​.
  • Complete and balance the equation for this reaction:
‾ NO2+‾ NH3→‾ N2+‾ H2O \underline{\quad}\ \text{NO}_2 + \underline{\quad}\ \text{NH}_3 \rightarrow \underline{\quad}\ \text{N}_2 + \underline{\quad}\ \text{H}_2\text{O} ​ NO2​+​ NH3​→​ N2​+​ H2​O
[2]
4.

Platinum in catalytic scrubbers acts as a heterogeneous catalyst to convert environmental pollutants. State the meaning of the term heterogeneous catalyst.

[2]
5.

Soot (particulate carbon, C\text{C}C) is another pollutant formed in jet engines during fuel combustion. Explain why carbon particulates are formed instead of carbon dioxide.

[1]

Transition metals (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Transition metals (A-level only)