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Acid rain
Rain with pH less than 5
Active sites
Places on catalyst's surface where reactant molecules adsorb
Addition polymer
Polymer made from alkenes and alkene derivates
Annealing
Softening heat treatment method
Atactic polypropene
Isomer of polypropene with randomly orientated methyl groups
Bauxite
Principal aluminium ore
Blast furnace
Extract iron from its ores
Catalyst poisoning
Deactivation of catalyst by reaction with contaminants
Catalytic cracking
Cracking reaction using catalysts such as zeolite
Cholesteric liquid crystal
Molecules aligned along a main axis in layers, molecule orientation for each layer is slightly different, twists give rise to colour
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