test to distinguish dil H2SO4 from dil HCl and dil. HNO3 by using BaCl2..
Dil. H2SO4 reacts with aq. BaCl2 to give a precipitate of BaSO4 whereas neither dil. HCl nor dil. HNO3 react with BaCl2.
The reaction with H2SO4 is as follows:
The reaction with H2SO4 is as follows: