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Calcium oxide Sodium nitride Silicon carbide Zinc sulphide
Nitric acid Boric acid Sulphuric acid Oxalic acid
Oxidation is removal of oxygen Oxidation and reduction takes place simultaneously Reduction is removal of hydrogen Chemical reaction is a physical change.
Exothermic Endothermic Evaporation Reduction
HF < HBr < HCl < HI HF < HCl < HBr < H HI < HCl < HBr < HF HI < HBr < HCl < HF
3 to 12 1 and 2 13 to 18 3 to 10
