Question

The surface tension of a liquid decreases with a rise in

• A. diameter of container
• B. temperature of the liquid
• C. thickness of container
• D. viscosity of the liquid

Answer 1

Answer: (B)

The surface tension of a liquid decreases with a rise in temperature except the molten cadmium and copper. For small range of temperatures, the variation of surface tension is given by the formula $S_t=S_0(1-at)$, where $S_0$ and $S_t$ are the surface tensions of liquid at $0^{\circ }C$ and $t^{\circ }C$ respectively and $a$ is the coefficient of surface tension withtemperature.