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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Explanation:
Aluminium foils are used to wrap food items because aluminium metal is malleable. Therefore, it can be beaten into thin foils. Metals are good conductors of heat and electricity. Therefore, immersion rods for heating liquids are made of metallic substances.
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