(a(i))[1]
Which one of the following pH values could belong to aqueous ammonia? Draw a circle round the correct answer: pH 1, pH 5, pH 7, pH 9.
(a(ii))[3]
Use the kinetic particle model to explain these observations.
(b(i))[1]
Balance the chemical equation for the first stage in the process: $4\text{NH}_3 + 5\text{O}_2 \rightarrow \ldots \text{NO} + 6\text{H}_2\text{O}$
(b(ii))[1]
What does the term exothermic mean?
(b(iii))[1]
How does this equation show that NO has been oxidised?
(b(iv))[1]
Would you classify nitrogen dioxide as an acidic oxide or as a basic oxide? Give a reason for your answer.
(c)[1]
State one harmful effect of oxides of nitrogen on health.
(d)[1]
Name the salt produced when ammonia reacts with nitric acid.