Question

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Q. 6. Give reasons for the following:
(a) Aluminium foils are used to wrap food items.
(b) Immersion rods 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:

a) because alumunium foil helps in maintaining the temorature of food.

Explanation:

Answer 2

a) aluminium foils are used to wrap food items because aluminium does not allow heat escape out from the food and keeps the food warm

b) immersion rods are made up of metallic substances because metals are good conductors of heat and electricity

c) copper cannot displace zinc from its salt solution because zinc has a higher reactive activity than copper

d) sodium and potassium are stored in kerosene because they are very highly reactive element

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