Edexcel A-Level Chemistry AS 4.14 The Problems Arising From Pollutants From the Combustion of Alkane Fuels Questions

Use marked Edexcel IAL Chemistry questions to explain carbon monoxide toxicity and link nitrogen oxides to acid rain and environmental damage.

Exam points

Explain carbon monoxide toxicity, especially in enclosed combustion contexts.
Link nitrogen oxides to acid rain and environmental damage.

[Maximum number: 1]

Some diesel cars contain an extra catalytic converter for the reduction of nitrogen oxides $\left(\mathrm{NO}_{\mathrm{x}}\right)$ in exhaust gases.
A solution of urea is used for this process.

Figure for Question Edexcel A-Level Chemistry AS 4.14 The Problems Arising From Pollutants From the Combustion of Alkane Fuels Questions question 1 — Edexcel A-Level Chemistry AS

urea

State why $\mathrm{NO}_{\mathrm{x}}$ emissions are harmful to the environment.

An answer that makes reference to the following point:

- (oxides of nitrogen lead to the formation of) acid rain

Allow formation of photochemical smog

Allow "NO can react with ozone"

Allow descriptions of acid rain formation e.g. forms $\mathrm{HNO}_{3}$

Do not award greenhouse effect / global warming

Do not award depletes the ozone layer without reference to nitrogen(II) oxide/NO

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Edexcel A-Level Chemistry AS 4.14 The Problems Arising From Pollutants From the Combustion of Alkane Fuels Questions question 1