Which statement is generally correct about the dependence of viscosity on temperature?
Options

Question

Which statement is generally correct about the dependence of viscosity on temperature?

G1 Physics · Accepted Answer

In liquids, viscosity arises mainly from intermolecular cohesive effects. As temperature increases, these cohesive effects become less effective, so liquid viscosity generally decreases. In gases, viscosity is associated mainly with molecular momentum transfer between layers. Higher temperature increases molecular speeds and momentum transport, so gas viscosity generally increases. Correct option: B.