Which of the following is an example of a pigment?
Silicon dioxide
Aluminium oxide
Cadmium sulphide
Boron oxide
Translate the following statements into chemical equations and then balance the equations :
(a) Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
(b) Phosphorus burns in oxygen to give phosphorus pentoxide.
(c) Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.
(d) Aluminium metal replaces iron from ferric oxide, Fe2O3 , giving aluminium oxide and iron.
(e) Barium chloride reacts with zinc sulphate to give zine chloride and barium sulphate.
Pick the odd member from the list giving reasons :
(a) Ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide.
(b) Copper oxide, aluminium oxide, sodium oxide, magnesium oxide.