With increase in temperature, the viscosity of

a) gases decreases

b) liquids increases

c) gases increases

d) liquids decreases

Answers (1)

The answer is the option (c) and (d)

If n is the coefficient of viscosity of a liquid, n\propto \frac{1}{\sqrt{T}}

In case of the viscosity of gases, n\propto \sqrt{T}

As the temperature increases, kinetic energy in the gas molecules also increases and hence due to the collisions between the molecules, the viscosity increases.

Whereas in case of a liquid, the kinetic energy increases with temperature, but the relative speed of the layers of liquid remains fairly the same as before. Hence option c and d are correct.

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