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 substance .
c)copper sulphate displace zinc from its salt solution .
d)sodium and potassium are stored in keresone .​

Answer 1

Explanation:

Aluminium is malleable, soft and does not react with food items, so it is used to wrap food items. (b) Metals are good conductor of heat and electricity, so immersion rods are made up of metallic substances. (c) Copper is less reactive than zinc, so it can not displace zinc from its salt solution.

Answer 2

Explanation:

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