Question

Which of the following statements is not correct?

• A. Viscosity of ethanol is smaller than that of glycol
• B. Viscosity of liquids increases with increase of pressure
• C. The variation of viscosity of liquids with temperature is given by \( \eta = A e^{-\frac{E}{RT}} \).
• D. The volume of liquid flowing in time \( t \) through a pipe is given by the Poiseuille equation.

Hint:

Viscosity is affected by temperature and pressure. The Arrhenius form of the viscosity equation shows the exponential dependence on temperature.

Answer 1

The Correct Option is C

Statement (3) is the correct form of the Arrhenius equation for viscosity, which shows that the viscosity decreases with increasing temperature, not the other way around. The other statements are correct with respect to the behavior of liquids.