Question

Oleum is

• A. castor oil
• B. oil of vitriol
• C. $fuming{H}_{2}S{O}_4$
• D. None of these

Answer 1

Answer: (C)

Disulphuric acid $(H_2{S}_2{O}_7)$ is called oleum or fuming sulphuric acid. It is strongest oxidising agent and more powerful dehydrating agent.