Hii Yuvraj!
Volatile liquids are the liquid which vapourise very fast. These are the liquids which evaporate easily under normal temperature conditions or room temperature. Vapourisation means getting into gaseous or vapour state. These liquids have a measurable vapour pressure. The examples of volatile liquids are - acetone, alcohol, petrol, ether gasoline, butyl acetate etc., Hope you get it.
All the best!