Name:

(a) The most abundant element in the earth's crust.

(b) A chemical called oxygenated water.

(c) A metal highly resistant to rusting.

(d) A mixture of oxygen and carbon dioxide used for artificial respiration.

(e) Two substances from which oxygen can be obtained on a large scale.

(f) An oxide and a carbonate containing oxygen.

(g) Two substances which undergo rapid oxidation.

(a) Taking hydrogen peroxide, how would you prepare oxygen in the laboratory?

(b) What is the role of manganese dioxide in the preparation of oxygen?

(c) Write the balanced chemical equation for the above chemical reaction.

(d) Why is hydrogen peroxide preferred in the preparation of oxygen gas?

(e) Why is oxygen collected by downward displacement of water?

(f) What happens when a glowing splinter is introduced in a jar containing oxygen?

(g) What happens when oxygen gas is passed through alkaline pyrogallol solution?

What are oxides? Give two examples for each of metallic and non-metallic oxides.

Name the three types of oxidation processes. In which of these, large amount of heat and light energy are produced?