Given below are two statements : Statement (I) : Viscosity of gases is greater than that of liquids. Statement (II) : Surface tension of a liquid decreases due to the presence of insoluble impurities. In the light of the above statements, choose the most appropriate answer from the options given below :

Step-by-step solution

Viscosity is a measure of a fluid's resistance to flow, and gases typically have lower molecular interactions and are less dense than liquids, resulting in lower viscosity. The presence of insoluble impurities in a liquid can decrease its surface tension. Surface tension is related to the cohesive forces between molecules at the surface of a liquid. Insoluble impurities can disrupt these cohesive forces, leading to a decrease in surface tension. Hence, this is the correct option.