1990 - WAEC Chemistry Past Questions and Answers - page 1

Catalytic hydrogenation of oils results in the production of

Which of the following reaction will not take place under normal conditions?

A sample of orange juice is suspected to have been contaminated with a yellow dye. Which of the following methods can be used to detect the dye?

The electronic configuration 1s^{2 2}2s ²2p ⁶3s²3p ⁶ is that of a

The heat accompanying the reaction represented by the equation H₂O _(l) → H ₂O_(g) is described as the heat of

Aluminum is above iron in the electrochemical series, yet iron corrodes easily on exposure to air while aluminium does not. This is because aluminium

When a solid melts and consequently boils, there is

Which of the following compounds will undergo additional reactions?

Which of the following reactions does not occur in the blast furnace during the extraction of iron?

A catayst which increases the rate of a chemical reaction does so by