WAEC past questions and answers-Chemistry

Here are the past questions and answers on Chemistry from previous years.We have taken our time to pick out questions that students have difficulty in solving all around West Africa.

1.State Gay-Lussac’s law and illustrate the law with one chemical reaction in chemistry.(SSCE JUNE 1988 THEORY)

SOLUTION

Gay-Lussac’s law states that when gases react,they do so in volumes which bear a single whole number ratio to one another and to the product,if it is a gas.

N⒉(g) + 3H⒉(g) + 2NH⒊(g)

1 : 3 : 2