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.

Answer:  (a) Aluminum is being used to wrap food since it is pliable, soft, and will not react with food. 

(b) Because metals are good heat and electricity conductors, immersion rods are composed of metallic materials. 

(c) Because copper becomes less active than zinc, it is unable to remove zinc out of its salt solution.

 (d) Because potassium and sodium are highly reactive to air and water, they are kept in kerosene.