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

  1. A

    The SI unit of viscosity is Pa s.

  2. B

    1 Pa s = 10 Poise.

  3. C

    The viscosity of a liquid decreases with increase in temperature

  4. D

    The viscosity of a gas decreases with increase in temperature

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    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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