Correct option is B
Surface tension is the property of a liquid that causes it to behave as though its surface were covered with a stretched elastic membrane. Mercury has a very high surface tension due to strong cohesive forces between its molecules. This high surface tension causes mercury to form droplets and not spread out or wet surfaces like glass. In contrast, water has a lower surface tension and wets glass due to greater adhesive forces between water molecules and glass.
Cohesion refers to the attractive force between similar molecules (e.g., mercury molecules attracting each other).
Adhesion refers to the attractive force between different types of molecules (e.g., mercury and glass).
Viscosity refers to a fluid's resistance to flow, not its wetting properties.
Thus, the reason mercury does not wet glass is primarily due to its high surface tension.
