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Give reasons for the following : Aluminium foils are used to wrap food items. Immersion rods for heating liquids are made up of metallic substances. Copper cannot displace zinc from its salt solution. Sodium and potassium are stored in kerosene.

Give reasons for the following :

Aluminium foils are used to wrap food items.
Immersion rods for heating liquids are made up of metallic substances.
Copper cannot displace zinc from its salt solution.
Sodium and potassium are stored in kerosene.

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 6228 Points
one month ago
Aluminium is a highly malleable metal and can be made into foils. So, it can be used to wrap food items. Metals are good conductors of electricity, therefore, they are used for making immersion rods. Copper is less reactive than zinc. Therefore, it cannot displace zinc from its salt solution. Sodium and potassium are highly reactive metals. On exposure to air, they get oxidized. To avoid this they are stored in kerosene.

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