What is the function of the thermometer during fractional distillation ?

The function of the thermometer during fractional distillation is to monitor and control the temperature of the distillation process. The temperature is a critical factor in separating the components of a mixture based on their boiling points. By monitoring the temperature, the distillation process can be optimized to ensure that each component is collected at the correct temperature range, leading to a more efficient separation of the mixture.

Measure the temperature of the vapors in the fractionating column.