For an ideal liquid solution, which of the following is unity?

Activity coefficient

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Fugacity coefficient

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Fugacity

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Activity

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Solution

The correct option is A Activity coefficient
An activity coefficient is a factor used in thermodynamics to account for deviations from ideal behavior in a mixture of chemical substances. Hence, for an ideal liquid solution, that deviation is 0, as the mole fraction of other substance is 0.
So, the activity coefficient is unity.

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