Correct Answer - Option 1 : increases
CONCEPT:
-
Viscosity is the property of the liquid due to which it opposes the relative motion between the layers of the liquid.
-
Viscous force is the resistive force that is acting between the layers of liquid and opposes the relative motion between the layers and is given by
\(\Rightarrow F = -η A \frac{dV}{dx}\)
Where η = Coefficient of viscosity, A = Area, and \(\frac{dV}{dx} = Velocity \ gradient \)
- According to the kinetic theory of gases as the temperature increases the velocity of gas molecules increases
- In the SI system of units, viscosity is measured in Pascal second, and in the CGS system of units, it is measured in Poise.
EXPLANATION :
- According to kinetic theory as the temperature increases the velocity of gas molecules increases.
- As the velocity increases the interaction between each molecule increases or else the intermolecular attractive force increases.
- As the intermolecular force increases there will be increases in the drag force between the different layers of the molecules.
- The increase in the drag force results in an increase in viscosity
- Hence, option 1 is the answer
