(a)[1]
Name one gas in clean, dry air that contributes to global warming.
(b)[1]
State the percentage of nitrogen found in clean, dry air.
(c)[1]
Name the material used to remove sulfur dioxide during flue gas desulfurisation.
(d)[1]
Name the device in a car exhaust that removes the $\text{NO}_2$ produced in car engines.
(e(i))[1]
From the list of formulae, select the gas that diffuses most rapidly. Circle your choice.\n\nCO CO$_2$ CH$_4$ NO$_2$ SO$_2$
(e(ii))[1]
Explain the reason for your answer to (i).
(f)[1]
State one harmful effect of carbon monoxide on human health.
(g)[2]
Name the two substances produced in photosynthesis.
(h)[2]
Finish the dot-and-cross diagram in Fig. 1.1 for a molecule of CO$_2$. Show only outer-shell electrons.