If vapour pressures of pure liquids \( \mathrm{A} \) \& \( \mathrm{B} \) are 300 and 800 tor...

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If vapour pressures of pure liquids \( \mathrm{A} \) \& \( \mathrm{B} \) are 300 and 800 torr respectively at \( 25^{\circ} \mathrm{C} \). When these two
P liquids are mixed at this temperature to form a solution

W in which mole percentage of \( \mathrm{B} \) is 92 , then the total vapour pressure is observed to be \( 0.95 \mathrm{~atm} \). Which of the following is true for this solution.
(1) \( \Delta V_{\text {mix }}0 \)
(2) \( \Delta \mathrm{H}_{\text {mix }}0 \)
(3) \( \Delta V_{\text {mix }}=0 \)
(4) \( \Delta \mathrm{H}_{\text {mix }}=0 \)
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