(a) The water-gas shift reaction (WGSR) describes the reaction of carbon monoxide and water vapour to form carbon dioxide and hydrogen (the mixture of carbon monoxide and hydrogen (not water) is known as water gas):
(b)( i)Same valency , diatomic molecules
(ii) Forms hydrides like halides
(iii) The ionization energy of Hydrogen and halogens are comparable.
(iv) Forms covalent bonds like halogens
