(a)[1]
Name the method used to obtain oxygen from air.
(b(i))[1]
What sort of reaction is shown by this ionic half-equation?
(b(ii))[1]
What type of substance donates hydrogen ions, H$^+$?
(c)[1]
Write a chemical equation for the total reaction taking place in a hydrogen fuel cell.
(d(i))[1]
Give one benefit of hydrogen fuel cells compared with petrol engines.
(d(ii))[1]
Give one drawback of hydrogen fuel cells compared with petrol engines.
(e(i))[2]
Write a chemical equation for the overall reaction occurring in an ethanol fuel cell.
(e(ii))[1]
State an environmental issue caused by carbon dioxide being released into the atmosphere.
(e(iii))[1]
Name the process used to produce ethanol from a renewable source.
(f)[1]
Name the process when electrical energy is used to decompose an ionic compound.