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Materials : Metals And Non-Metals

Question

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Can you store acidic lemon pickles in an aluminium utensils? Explain.

Solution

No, we cannot store acidic lemon pickles in aluminium utensils because aluminium is a metal. Metals readily react with acids to produce metal salt and hydrogen gas. So, when the aluminium metal comes in contact with acidic lemon pickles, it would react to release hydrogen, which would spoil the food and render it unfit to consume.

Acid +Metal ---> Metal salt + Hydrogen gas

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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