Question

when a mixture of water and alcohol is distilled which of the two will distil out first ?why?

Answer 1

alcohol because it is voletile

Answer 2

Both water and alcohol have different boiling point. This distillation is mainly known as fractional distillation to obtain purest form of alcohol
Alcohol boils at lower temperature than the water, during distillation the alcohol vaporizes and the water will remains at liquid