Question

What is the effect of pressure on (i) viscosity, (ii) surface tension, (iii) density of liquid ?

Answer 1

hey mate here is your answer
with the increase in pressure the viscosity decrease and vice versa
surface tension increase with increasing in pressure
density also increase with increase in pressure

Answer 2

i) For liquids, viscosity increases with increasing pressure because the amount of free volume in the internal structure decreases due to compression because the molecules moves freely and internal friction forces increase.

We know that liquids are in-compressible unless the pressure increase is significant, so the viscosity change is not that much.

ii) The viscosity of the liquid decreases with increase in temperature, if the temperature increases with impurities the surface tension decreases.

iii) We know that P/d = C; here P is the pressure, d is the density and C is the concentration. Liquids are in-compressible in nature so the density does not change with pressure. But if the pressure increases the density of the liquid also increases.