Question

23.
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.​

Answer 1

Answer:

a.aluminium foils are used to wrap food items because they does not react with food items

Explanation:

as they are soft,malleable

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Answer 2

• first aluminum foils keep food warm for longer time and keep the food aroma and moisture. and second aluminium are very malleable substances therefore it can be converted into thin sheets for wrapping food. and it save the food from light and oxygen
• because metals are good conductor of heat.
• because of its zinc have higher oxidation potential or we can say zinc have higher positive electrode potential.

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