Which substance is known as Oil of Vitriol?

Which substance is known as Oil of Vitriol?

کون سا مادہ وٹریول کے تیل کے نام سے جانا جاتا ہے؟
Explanation

Sulfuric acid is a mineral acid composed of the elements sulfur, oxygen and hydrogen.

It is a colorless, odorless and viscous liquid that is miscible with water.