The correct option for the value of vapour pressure of a solution at 45°C with benzene to octane in molar ratio 3 : 2 is : [At 45°C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm

Question

The correct option for the value of vapour pressure of a solution at 45°C with benzene to octane in molar ratio 3 : 2 is : [At 45°C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]

(A) 160 mm of Hg
(B) 168 mm of Hg
(C) 336 mm of Hg
(D) 350 mm of Hg

Prashant Kotian · Accepted Answer

Correct answer: C. B O n 3 n 2 = nB = 3, nO = 2 nTotal = 3 + 2 = 5 B B T n 3 X n 5 = = = = O O T n 2 X n 5 º º S B B O O P P P = ´ + ´ S 3 2 P 280 420 5 5 = ´ + ´ = 336 mm of Hg

💡 Solution & Explanation

Practice 22,000+ questions like this