1998 - WAEC Chemistry Past Questions and Answers - page 1

AN AQUEOUS SOLUTION IS ACIDIC IF

The following oxides react with water except

Which of the following is not a property of trioxonitrate (V) salts?

Which of the following methods is suitable for the preparation of an insoluble salt?

What is the function of sulphur (IV) oxide in the reaction represented by the following equation? SO _2(aq) + 2H₂S_(g) → 3S _(s) + 2H ₂O _(l)

Which of the following will produce oxygen and hydrogen during its electrolysis using platinum electrode?

What mass of copper would be deposited by a current of 1. 0 ampere passing for 965 seconds through copper (ll) tetraoxosulphate (IV) solution? [Cu = 63.5; 1F = 96500C]

How many electrons are removed from Cr^2- when it is oxidized to CrO₄^2-?

Substances which absorb water from the atmosphere without dissolving in it are sid to be

Pipe-borne water is usually chlorinated in order to