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Q.

Viscosity of liquid ______ with rise in temperature.

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a

Decreases

b

First increases then decreases

c

Increases

d

Remains constant

answer is A.

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Detailed Solution

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In liquids, the main cause of viscosity is cohesion between the molecules. When there is an increase in temperature the cohesive force decreases and the energy of the particles becomes more. therefore, the movement of particles becomes easy. That is why the viscosity of liquid decreases when there is an increase in temperature.

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Viscosity of liquid ______ with rise in temperature.