1.

Conc. H_2SO_4 is diluted

Answer»

by adding WATER in `H_(2)SO_(4)`
by adding `H_(2)SO_(4)` in water
by adding GLACIAL acetic acid in `H_(2)SO_(4)`
NONE of these

Solution :Concentrated `H_2SO_4`, is diluted by adding the conc. `H_2SO_4` in the water drop by drop with constant stirring because it is an exofhermic REACTION and by doing so heat is generated slowly and dissipiated in the atmosphere.


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