The reason for water droplets not sticking to oily surfaces is

The reason water droplets do not stick to oily surfaces is primarily due to the lack of adhesive force (option A) between water and oil molecules. Adhesive forces occur between molecules of different substances, causing them to cling together. However, water and oil have different polarities; water is polar, while oil is nonpolar. Therefore, the adhesive forces between water and oil are weak, resulting in poor wetting and minimal surface interaction. This lack of adhesion prevents water droplets from spreading or adhering to oily surfaces. Additionally, the presence of surface tension (option B) in water further inhibits its ability to spread on oily surfaces, contributing to the formation of distinct droplets. While water and oil cannot mix with each other (option C) due to their differing polarities, this does not directly explain the lack of water droplet adhesion to oily surfaces. The relative densities of water and oil (option D) are also not directly related to the adhesion phenomenon described.