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Give reasons for the following:(i)Silver is used in making mirrors.(ii)Aluminium is used to make electrical wires.(iii)F

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Question of Solved questions

Metal and Non-metals of Class 8

Question

Give reasons for the following:

(i) Silver is used in making mirrors.

(ii) Aluminium is used to make electrical wires.

(iii) Foodstuffs with acid components should not be stored in aluminium utensils.

(iv) Iron is used in constructing bridges and houses.

(v) Graphite is used as an electrode in the dry cell.

(vi) Iron sheets are galvanized before use.

Answer:
(i) Silver is used in the mirror because it has Low-density material, so its weight is less than the other white-colored
 
metal. It also has a high reflection property of white color and non-corrosive nature.
 
(ii) Aluminium is a good conductor of electricity.
 
(iii) Acids react with aluminium.
 
(iv) Iron is a hard, strong and rigid metal.
 
(v) Graphite is a good conductor of electricity.
 
(vi) Iron on exposure to atmosphere gets rusted. 
 
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