Question

Does coefficient of viscosity of a liquid decreases of increases with temperature

Answer 1

The coefficient of viscosity is the degree to which a fluid resists the tendency to flow.
The coefficient of viscosity decreases with increase in temperature. A liquid with high coefficient of viscosity has molecules held together with strong intermolecular attractive forces. With increase in temperature, the velocity of individual molecules increases. This decreases the intermolecular forces that hold the molecules together thereby increasing the fluidity and decreasing the coefficient of viscosity.