Question

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

Answer 1

Answer:

The reasons are as follows:

Explanation:

(a) Aluminium is used to wrap food items because it is a malleable metal and does not react with food items.

(b) Imersion Rods for heating liquids are made of metal substance because they are good conductors of heat.

(c) copper cannot displace zinc from its salt solution because it is less reactive than zinc according to the reactivity series.

(d) sodium and potassium are stored in kerosene because kerosene prevents their contact with atmospheric gases. if they react with atmospheric gases, it ignites. so, in order to prevent the ignition sodium and potassium are stored in kerosene.

Answer 2

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