A bottle of fire exitingushers contain `H_(2)SO_(4)` and:

A fire extinguisher contains H_(2)SO_(4) and

A fire extinguisher contains H_(2)SO_(4) and

Fire extinguishers contain H_2SO_4 and,

A white solid is first heated with dil H_(2)SO_(4) and then with conc. H_(2)SO_(4) . No action was observed in either case. The solid salt contains-

A white solid is first heated with dil H_(2)SO_(4) and then with conc. H_(2)SO_(4) . No action was observed in either case. The solid salt contains:

25 gm of an oleum sample contains 15 gm H_(2)SO_(4) . What is % labellling of this oleum sample-