Statement I : Liquids tend to have maximum number of molecules at thei...
Statement I: Liquids tend to have maximum number of molecules at their surface.
Statement II: Small liquid drops have spherical shape.
Explanation:
Statement I: Liquids tend to have maximum number of molecules at their surface.
This statement is correct. Liquids have a tendency to minimize their surface area due to intermolecular forces. The molecules at the surface of a liquid experience different forces compared to the molecules in the bulk of the liquid. The molecules in the bulk are surrounded by other molecules from all sides and are attracted equally in all directions. However, the molecules at the surface have unbalanced forces, as they are only attracted by the molecules below and around them. This leads to a net inward force, causing the liquid to minimize its surface area and form a droplet or spread out as a thin film.
Statement II: Small liquid drops have spherical shape.
This statement is also correct. When a liquid drop is small, the cohesive forces between its molecules dominate over the adhesive forces between the liquid and its surroundings. Cohesion refers to the attraction between molecules of the same substance, while adhesion refers to the attraction between molecules of different substances. The cohesive forces tend to pull the liquid molecules towards each other, resulting in a spherical shape. This is because a sphere has the minimum surface area for a given volume, allowing the liquid to minimize its surface energy.
Explanation of the relationship between the statements:
Both Statement I and Statement II are correct, but Statement II is not the correct explanation of Statement I. While both statements individually describe the behavior of liquids, they are not directly related to each other. Statement I explains the tendency of liquids to have a maximum number of molecules at their surface due to intermolecular forces, while Statement II describes the spherical shape of small liquid drops due to cohesive forces.
Therefore, the correct answer is option B: Both Statement I and Statement II are correct, and Statement II is not the correct explanation of Statement I.
Statement I : Liquids tend to have maximum number of molecules at thei...
Assertion is false but reason is true. Liquid tend to reduce number of molecules or surface tension at there surface, that's why small liquid drops have spherical shape.