1994 - WAEC Chemistry Past Questions and Answers - page 2
The following will decolourize acidified potassium tetraoxomanganate (VII) solution except
Polyatomicity is illustrated by molecules of
Calcium is usually extracted by the electrolysis of its
When naphthalene on heating changes from the solid state directly to the gaseous state it undergoes
Which of the following occurs when an aqueous solution of sodium hydroxide is electrolysed using graphite electrodes?
If the volume of a given mass of gas at 0oC is 27.3cm3, what will be the volume of the gas at 10oC, pressure remaining constant?
Glucose can be obtained from starch by
How many faradays of electricity are required to liberate 9g aluminium? (AI = 27)
When water is dropped on calcium carbide, the gaseous product is an
Mg2 + 2HCI(aq) → MgCI2(g) + H2(g) From the equation above what mass of hydrogen would be produced if 12.0 g of magnesium reacted completely with dilute hydrochloric acid? (H = 1, Mg = 24)