1In what forms is oxygen found in nature? Give examples.
2Who first prepared oxygen, and how? Who gave it its name?
3Write the balanced equation for the laboratory preparation of oxygen using heat. What is the role of manganese dioxide?
4Why is the hard glass test tube tilted slightly towards its mouth when oxygen is prepared by heating?
5Why is oxygen collected by downward displacement of water?
6When oxygen is made without heat, why must the lower tip of the thistle funnel be under the liquid?
7How do you test that a collected gas is oxygen?
8Write any five physical properties of oxygen.
9Write balanced equations for magnesium, carbon and sulphur burning in oxygen.
10How does oxygen give energy in respiration? Write the equation.
11Write any four uses of oxygen gas.