1.

Give scientific reasons for the following:(1) Sodium is stored under kerosene.(2) Gold and silver are used to make jewellery.(3) Calcium floats over water during the reaction with water.(4) Ionic compounds have high melting and boiling points.(5) Tarnished copper utensils are cleaned with lime juice or tamarind.

Answer»

Give scientific reasons for the following:



(1) Sodium is stored under kerosene.



(2) Gold and silver are used to make jewellery.



(3) Calcium floats over water during the reaction with water.



(4) Ionic compounds have high melting and boiling points.



(5) Tarnished copper utensils are cleaned with lime juice or tamarind.



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