[amp_mcq option1=”remains same” option2=”increases” option3=”decreases” option4=”shows erratic behaviour” correct=”option2″]
The correct answer is: B. increases
Viscosity is a measure of a fluid’s resistance to flow. It is caused by the friction between the molecules of the fluid. The higher the viscosity, the more resistance there is to flow.
For very great pressures, the viscosity of both gases and liquids increases. This is because the molecules of the fluid are forced closer together, which increases the friction between them.
Option A is incorrect because the viscosity of a fluid does not remain the same for very great pressures. It increases.
Option C is incorrect because the viscosity of a fluid decreases for very low pressures, not for very great pressures.
Option D is incorrect because the viscosity of a fluid does not show erratic behavior for very great pressures. It increases.