The viscosity of all liquids decreases as the temperature is a) increased b) decreased c) maintained constant d) fluctuating e) none of these

b) decreased

Explanation:

Viscosity is the measure of the resistance between the layers of the liquid. On increasing temperature, the kinetic energy of the molecules of the liquid increases which in turn increase in the random motion of the molecules. Thus,  the relative motion of  the molecules in the liquid become easier and hence, viscosity decreases.

energy can cross the boundaries of a closed system in the form of heat and mass

explanation:

answer:

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