The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in the vapour phase. A suitable method for the extraction of these oils from the flowers is:JEE Main 2024 (31 Jan Shift 2)AcrystallisationBdistillation under reduced pressureCdistillationDsteam distillation

The correct method for the extraction of essential oils from flowers is D) steam distillation.

Here's why:

Steam distillation is a separation process used to purify or isolate temperature-sensitive materials, such as natural aromatic compounds. Essential oils are often extracted using this method because they are generally insoluble in water at room temperature but are miscible with water vapour in the vapour phase.

In steam distillation, steam is passed through the plant material. The heat from the steam causes the plant's cell walls to break and release the essential oil. The steam and oil are then cooled, causing them to condense into a liquid from which the essential oil can be separated.

The other methods listed (crystallisation, distillation under reduced pressure, and distillation) are not suitable for extracting essential oils from flowers. Crystallisation is typically used to purify solids, not liquids. Distillation under reduced pressure, also known as vacuum distillation, is used when the boiling point of the substance is high. Regular distillation is not suitable for temperature-sensitive materials like essential oils.