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NEET · Chemistry · STD 12 -1. Solution and colligative properties
Toluene in the vapour phase is in equilibrium with a solution of benzene and toluene having mole fraction of toulene \(0.50\) If vapour pressure of pure benzene is \(119\, torr\) and that of toluene is \(37.0\) \(torr\) at the same temperature, mole fraction of toluene in vapour phase will be:
- A \(0.462\)
- B \(0.237\)
- C \(0.506\)
- D \(0.325\)
Answer & Solution
Correct Answer
(B) \(0.237\)
Step-by-step Solution
Detailed explanation
\(P_{\text {total }}= P _{ A }^{0} X _{ A }+ P _{ B }^{0} X _{ B }\) \(=37 \times 0.5+119 \times 0.5\)
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