Question

Give reasons for the following.
(a) Aluminium foils are used to wrap food items.
(b) Immersion rods for heating liquids are made up of metallic substances.
(c) Copper cannot displace zinc from its salt solution.
(d) Sodium and potassium are stored in kerosene.
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Answer 1

Answer:

aluminium foils are used to wrap food item because we can easily make foil from aluminium in compare of any other metal

immersion rods for heating are made up of metallic substance because metals are good conductor of heat

copper cannot displaced zinc from its salt solution because zinc is more reactive than copper

sodium and potassium are very reactive metal they can easily react with air and water so they are always kept in kerosene

Answer 2

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