Question

Give reasons for the following:
(i) Aluminium foils are used to wrap food items.

(ii) Immersion rods for heating liquids are made up of metallic substances.

(ii) Copper cannot displace zinc from its salt solution.

(iv) Sodium and potassium are stored in kerosene. ​

Answer 1

Explanation:

Hence, immersion rods for heating liquids are made up of metallic substances. Copper is less reactive than zinc. In a salt solution,a less reactive metal cannot displace a more reactive

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Answer 2

Answer:

Question:—

Give reasons for the following:

(i) Aluminium foils are used to wrap food items.

Aluminium is highly malleable metal and it is very easy to make aluminium foil in comparison to other metals..

(ii) Immersion rods for heating liquids are made up of metallic substances.

Immersion rods are made up of metallic substances because metals are good Conductors of heat and electricity..

(iii) Copper cannot displace zinc from its salt solution.

Copper cannot displace zinc from its solution because zinc is more reactive than copper(i.e. Copper is less reactive than zinc.)

(iv)Sodium and potassium are stored in kerosene.

Sodium and potassium metals are very reactive as they react with oxygen and water easily. A lot of heat is produced in the reaction so sodium and potassium are always stored in kerosene..

Explanation:

Hope this answer helps you..