NEET · Chemistry · STD 12 -1. Solution and colligative properties
The correct option for the value of vapour pressure of a solution at \(45^{\circ} \mathrm{C}\) with benzene to octane in molar ratio \(3: 2\) is ...... \(\mathrm{mm}\) of \(\mathrm{Hg}\) [At \(45^{\circ} \mathrm{C}\) vapour pressure of benzene is \(280\, \mathrm{~mm} \,\mathrm{Hg}\) and that of octane is \(420\, \mathrm{~mm} \,\mathrm{Hg}\). Assume Ideal gas]
- A \(160\)
- B \(168\)
- C \(336\)
- D \(350\)
Answer & Solution
Correct Answer
(C) \(336\)
Step-by-step Solution
Detailed explanation
\(\mathrm{P}_{\mathrm{s}}=\mathrm{P}_{\mathrm{A}}^{\mathrm{O}} \mathrm{x}_{\mathrm{A}}+\mathrm{P}_{\mathrm{B}}^{\mathrm{O}} \mathrm{x}_{\mathrm{B}}\) \(=280 \times \frac{3}{5}+420 \times \frac{2}{5}\)
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