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Materials : Metals And Non-Metals

Question

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What are the different uses of metals?

Solution

Metals are very useful to us. Some of the uses of common metals are following :

(a) Copper and aluminium metals are used to make electric wires. This is because copper and aluminium are good conductors of electricity.

(b) Copper, aluminium and iron metals are used for making utensils and other domestic things. These metals are also used to make various factory equipments. This is because, all these metals are good conductors of heat.

(c) Iron is used to make heavy machinery and is also used in construction of buildings because it is very heavy and strong.

(d) Thin foils of aluminium are used in packaging food materials and medicines etc.

(e)The liquid metal mercury is used in thermometers.

(f) Gold and silver metals are used to make jewellery.

(g) Sodium, titanium and zirconium metals are used in atomic energy and space projects.

Some More Questions From Materials : Metals And Non-Metals Chapter

Metals react with acids to produce ________ gas.

Generally, non-metals react with acids.

Sodium is a very reactive metal.

Copper displaces zinc from zinc sulphate solution.

Carbon can be drawn into wires.

Some properties are listed in the following table. Distinguish between metals and non-metals on the basis of their properties.

Properties

Metals

Non-metals

1. Appearance

2. Hardness

3. Malleability

4. Ductility

5. Heat Conduction

6. Conduction of Electricity

Give reasons for the following :

Aluminium foils are used to wrap food items.

Give reasons for the following :

Immersion rods are made up of metallic substances.

Give reasons for the following :

Copper cannot displace zinc from its salt solution.

Give reasons for the following :

Sodium and Potassium are stored in kerosene?

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