Q.

Which one of the following statements about physical equilibrium is incorrect ?

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a

At atmospheric pressure the temperature at which the solid and liquid phases are at equilibrium is called normal freezing point of the substance.

b

At 273 K and 1 atm pressure, ice and water are at equilibrium with each other

c

At room conditions, water in an open vessel is in equilibrium with water vapour.

d

In saturated solution, a dynamic equilibrium exist between the solute molecules in the solid state and in the solution.

answer is C.

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Detailed Solution

It is not possible to attain equilibrium for a liquid vapour system in an open vessel.
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