(a)(i)
(ii) - used as germicide/disinfectant/sterilization/antiseptic/insecticides
bleaching of materials/wood pulp/textiles
commercial production of HCl
production of polymers/PVC/plastics
production of chlorinated chemicals e.g. CHCl\(_3\), CCl\(_4\)
in medicine
production of dyes
(b) Water gas is CO + H\(_2\) steam is mixed with water gas and passed over heated catalyst of iron (III) oxide or chromium (III) oxide at 450\(^o\)
CThe CO in water gas is converted to CO\(_2\)
with further yield of hydrogen
The CO\(_2\) is removed by dissolving the mixture in water
/ NaOH/KOH/Ca(OH)\(_2\) solutions under pressure
(c) (i) Bauxite
(ii) - To produce aluminium oxide/alumina.
- To prevent poisoning of the electrode.
(iii) Carbon/ graphite
(iv) - It is added to reduce some of the energy (costs) involved in extracting aluminium
- to increase the electrical conductivity of alumina
- to lower the melting points to of the alumina
(d) Coke
- Coal tar
- Coal gas
- ammoniacal liquor
