In the laboratory preparation of oxygen from hydrogen peroxide – answer the following:

(a) Draw a neat and labelled diagram for the method used in above preparation.

(b) Name the catalyst used in the preparation and state its function.

(c) State the word equation for the reaction involving the above preparation of oxygen.

(d) State the method of collection of the oxygen gas giving reasons.

Give word equations for the reactions of –

(a) Non-metals —

1. Sulphur
2. Carbon
3. Phosphorus

(b) Metals —

1. Sodium
2. Calcium
3. Magnesium

with oxygen.

Distinguish between Combustion and Rusting with suitable word equations only.

Give the main experimental points only to demonstrate that —

(a) magnesium

(b) candle

gains weight on burning.