Find out the names of three metals and three non-metals from the box given as Fig 4.2.

Some of the following statements are incorrect. Find the incorrect statements and correct them.

(a) The property of metals by virtue of which they can be drawn into wires is called ductility.

(b) Metals are good conductor of electricity but poor conductor of heat.

(c) Articles made of metals produce ringing sound when struck hard.

(d) Oxides of non-metals and metals are acidic in nature.

(e) A less reactive metal replaces a more reactive metal from its salt solution in water.

Iron is more reactive than copper. Can you write an activity to show this?

Fill in the blanks to compete the following paragraph.

The name of the product formed in the reaction of sulphur and ______ is sulphur dioxide gas. When sulphur dioxide is dissolved in ______ , Sulphurous acid is formed. The suphurous acid turns ______ litmus paper to ______. Generally oxides of ______ are acidic in nature.

Compete the cross words given in Fig 4.3 with the help of the clues.

Across

1. Which is generally hard, ductile, mallable and sonorous.

2. A metal is called so it can be drawn into wires.

3. Metal bells are used because of this property.

Down

4. A metal generally used for making jewellery.

5. A metal which is liquid at room temperature.

6. A metal which reacts with acid as well as base to form hydrogen gas.

7. Substances used to enhance the growth of plants.

8. Property by virtue of which metals can be beaten into thin sheets.