Question

1. Describe the laboratory preparation of oxygen 2. State three physical properties of oxygen 3. List five oxides 4. Mention three uses of oxygen

Answer 1

Answer:

1. to make oxygen in the laboratory, hydrogen peroxide is poured into a conical flask containing some manganese (6) oxide. the gas produced is collected in a upside down gas jar filled with water. as the oxygen collects in the top of the gas jar, it pushes the water out.

2. ● color : colourless

● taste : a tasteless gas

● phase : gas

3. • carbon dioxide

• silicon dioxide

• iron dioxide

• aluminium dioxide

• sodium hydroxide

4. oxygen is used for breathing.

oxygen is used for burning a candle.

oxygen is used for our life.