Question

give scientific reasons , a ) in the electrolysis of water oxygen gas is liberated in the anode only (b) for white washing of walls we use slaked lime only (c) calcium oxide and water , both should not me made to react in plastic containers​

Answer 1

Explanation:

(a) During the electrolysis of water Oxygen gas is liberated only at anode because oxygen is a negative element which will get attracted towards the positive electrode.

(b) We use only slaked lime for whitewashing walls because when slaked lime gets mixed with the atmospheric carbon dioxide it gives a shiny texture to the walls.

(c) When calcium oxide is mixed with water it releases energy in the form of heat. The heat released is very large which can cause the plastic container to melt or burst during the reaction. Thus we do not opt to use plastic containers while preparing a reaction of calcium oxide and water.