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At a given temperature there is only ________ pressure at which the vapour and liquid phases of a pure substances may exist in equilibrium.

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At a given temperature there is only ________ pressure at which the vapour and liquid phases of a pure substances may exist in equilibrium.

(a) Three

(b) Two

(c) One

(d) None of the mentioned

The question was posed to me in examination.

The origin of the question is Phase diagrams and Phase Rule-I in section Multiphase Equilibrium of Chemical Process Calculation

1 Answer

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Best answer
Right option is (c) One

Explanation: At a given temperature there is only one pressure at which the vapour and liquid phases of a pure substances may exist in equilibrium.

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