Viscosity of gases _with temperature, whereas viscosity of liquids _with temperature.

increases

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decreases

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Solution

The viscosity of Gases:
The viscosity of a fluid (liquid or gas) is its resistance to a change in shape or movement of neighboring portions relative to one another.
Viscosity denotes resistance to flow.
Viscosity in gases is caused by molecules passing through layers of flow and transferring momentum between them.
This momentum transfer can be thought of as a frictional force between layers of flow.
Gas viscosity increases with temperature, whereas liquid viscosity decreases with temperature. Because intermolecular forces weaken with temperature, viscosity decreases.
Temperature increases typically cause an increase in molecular interchange because molecules move faster at higher temperatures. The coefficient of viscosity is a measure of the fluid's resistance to flow.

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Fill in the blanks using the word(s) from the list appended with each statement:

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Q. Fill in the blanks using the word(s) from the list appended with each statement: (a) Surface tension of liquids generally . . . with temperatures (increases / decreases) (b) Viscosity of gases . . . with temperature, whereas viscosity of liquids . . . with temperature (increases / decreases) (c) For solids with elastic modulus of rigidity, the shearing force is proportional to . . . , while for fluids it is proportional to . .. (shear strain / rate of shear strain) (d) For a fluid in a steady flow, the increase in flow speed at a constriction follows (conservation of mass / Bernoulli’s principle) (e) For the model of a plane in a wind tunnel, turbulence occurs at a ... speed for turbulence for an actual plane (greater / smaller)

Q. Fill in the blanks using the word(s) from the list appended with each statement.
(a) Surface tension of liquids generally ....... with temperatures. (increases / decreases)
(b) Viscosity of gases ........ with temperature, whereas viscosity of liquids ....... with temperature (increases / decreases)
(c) For solids with elastic modulus of rigidity, the shearing force is proportional to ....... , while for fluids it is proportional to ....... (shear strain / rate of shear strain)
(d) For a fluid in a steady flow, the increase in flow speed at a constriction follows (conservation of mass / Bernoullis principle)
(e) For the model of a plane in a wind tunnel, turbulence occurs at a ....... speed for turbulence for an actual plane (greater / smaller)

Q. Viscosity is a property of
(a) liquids only
(b) solids only
(c) solids and liquids only
(d) liquids and gases only.

Viscosity of gases _______with temperature, whereas viscosity of liquids _______with temperature.

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