Answer:
Vaporization is the process by which a substance changes from its solid or liquid state to a gaseous state.
Since both liquids are of the same volume and are placed under the same temperature condition, for them to not to vaporize at the same time, they must have been in different containers.
For vaporization to take place, the volume of liquid, amount of air exposure and area of the surface must be considered.
Maybe the first liquid was in a dish which has a large opening, thereby exposing a large amount which can make water to evaporate faster, whereas the second liquid was somehow enclosed (in a deeper dish).