JEE Main Chemistry question

Chemistry The p-Block Elements JEE Main

Oleum (or fuming ) is:

(A)A mixture of conc. and oil
(B)Sulphuric acid which gives fumes of sulphur dioxide
(C)Sulphuric acid saturated with sulphur trioxide, i.e. Correct
(D)A mixture of sulphuric acid and nitric acid

Answer: (C)

Solution

Oleum is sulphuric acid saturated with excess dissolved , effectively pyrosulphuric acid, .

Question ID VK-146528