Materials: Metals and Non-Metals

Materials: Metals and non-metals Worksheet-7

1. What happens when Hydrochloric acid is poured on aluminium foils?

2. Sodium is dropped in water?

3. A copper spoon had fallen into a container containing dil. HCl. What would happen to it if it is dipped in it for four days?

4. Give reasons for the following :

(a) Metals are used for making bells.

(b) We can't use pure gold to make jewellery.

Materials: Metals and non-metals Worksheet-8

11. Give reason: Immersion rods for heating liquids are made up of metallic substances.

12. Give reason: Copper cannot displace zinc from its salt solution.

13. What happens when

(a) Dilute sulphuric acid is poured on copper plate?

(b) Iron nails are placed in copper sulphate solution?

Write word equations of the reactions involved.

Materials: Metals and non-metals Worksheet-9

1. Match the substances given in Column I with their uses given in Column II.

True / False:

2. Sodium is a very reactive metal.

3. Copper displaces zinc from zinc sulphate solution.

4. Magnesium reacts with cold water.

5. All metals exist in solid state at room temperature.