Propane, a three-carbon alkane, belongs to the group of liquefied petroleum gases. It is used as a fuel, propellant, and refrigerant. It is also used in commercial, petrochemical, and agricultural heat industries.
Polyvinyl chloride is a white solid synthetic plastic polymer. It is used in medical, transport, construction, packaging, electric, and clothing industries in products like drainpipes, electrical cables, shoes, etc.
Cupric sulphate, a blue-coloured crystal, commonly known as blue vitriol, is a salt of cupric oxide and sulphuric acid. It contains five molecules of water and upon heating, loses the water molecules to produce its white-coloured anhydrous form.
Ethanol is a flammable colourless liquid. It is used as an alternative fuel and is commonly used as motor fuel or as an additive in gasoline and is in fact considered as an option for more "renewable" energy.