Question

while dulting sulfuric acid is slowly added to the water not by adding water to acid give scientific reason​

Answer 1

Answer:

Dilution of concentrated acid is an exothermic process. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. When the acid is added to water slowly with constant stirring, the mixture will not splash out.

Answer 2

Layman terms

Acid is added to water and NOT water to acid as the acid liberates heat when water is added. So, if there is excess amount of acid with little water, it can boil harshly (depending on the acid) and can spill.

Explanation

With the concentration of acid greater than water, the solution will release excessive amounts of heat and may cause spillage. So, to prevent that, the concentration of water should be greater than the conc. of the acid when diluting.