Chemistry

Chemistry past questions and answers from WAEC and JAMB

Page 8

A basic postulate of the kinetic theory of gases is that the molecule of gases move in straight lines between collisions. This implies that

Collisions are perfectly elastic

Forces of repulsion exist

Forces of repulsion and attraction are in equilibrium

Collisions are inelastic

Which of the following sources of energy contributes to the green-house effect

Natural gas

Nuclear

Wind

Solar

Alluminium is used in the manufacture of aircraft because it:

is hard and brittle

is light and resists corrosion

has high density and conducts electricity

is malleable and ductile

Four elements W, X, Y and Z have atomic numbers 2, 6, 16 and 20 respectively. Which of these elements is a metal?