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Q.

Which of the following statements regarding a liquid is not correct?

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a

The viscosity of a liquid decreases with increase in temperature

b

The viscosity of a gas decreases with increase in temperature

c

1 Pa s = 10 Poise.

d

The SI unit of viscosity is Pa s.

answer is D.

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Detailed Solution

The viscosity of a gas decreases with increase in temperature. Statements D regarding a liquid is not correct.

Because the cohesive force between the water molecules weakens with rising liquid temperature, viscosity lowers.

Hence option D is correct. 

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