Question

With increase in the shear rate, the apparent viscosity of pseudoplastic fluids

A. increases
B. decreases
C. remains the same
D. may increase or decrease; depends on the magnitude of shear rate

Answer 1

The apparent viscosity of pseudoplastic fluids decreases with an increase in the shear rate, due to the alignment of particles which reduces internal friction.

Step-by-step explanation:

With the increase in the shear rate, the apparent viscosity of pseudoplastic fluids decreases. Pseudoplastic fluids, also known as shear-thinning fluids, exhibit a decrease in viscosity with increased shear rates. This is due to the alignment of particles within the fluid, which reduces internal friction and allows the layers of fluid to slide past each other more easily. Therefore, the correct answer is B. decreases.