Final answer:
Alcohol has a lower boiling point than water and will boil first. This characteristic makes alcohol suitable for distillation, a process that separates substances based on their different boiling points. Therefore correct option is A
Step-by-step explanation:
The liquid with a lower boiling point between water and alcohol that boils first and can be used in distillation is alcohol (Answer A). This is because alcohols generally have lower boiling points than water. For instance, ethanol, a common type of alcohol, has a boiling point of around 78°C, whereas water boils at 100°C. The characteristic stronger hydrogen bonding in water is the reason for its higher boiling point compared to alcohols, which also form hydrogen bonds but with weaker intermolecular forces.
The process of distillation takes advantage of the boiling points' differences to separate components in a mixture. In the case of alcoholic spirits like brandy or whiskey, distillation is used to concentrate the alcohol by boiling it away from the water and other substances present.