Which of the following statement is correct for oleum ?
(1) It is prepared by adsorption of SO3 in conc. H2SO4
(2) It contains O–O groups
(3) I has six OH groups
(4) of these
Correct option: (1) It is prepared by adsorption of SO3 in conc. H2SO4
Explanation:
H2SO4(l) + SO3(g) → H2S2O7 (oleum)
Structure of oleum (pyrosulphuric acid)
