Q. Oleum is
A) Castor oil
B) Oil of vitriol
C) Fuming H_{2}SO_{4}
D) None of these
Explanation
(c)
Oleum is obtained by dissolving sulphur trioxide in H_{2}SO_{4}
SO_{3}+ H_{2}SO_{4} (conc.) ⟶H_{2}S_{2}O_{7}
_{oleum}
Oleum is also called fuming sulphuric acid because it fumes in moist air due to sulphur trioxide.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.