Give reasons for the following.
(a) Aluminum 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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Detailed Solution

(a) Aluminum foils are used to wrap food items because aluminum being a soft malleable metal can be beaten to in sheets to form thin wrapping sheets. Moreover, it does not react with food items.

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