21. On mixing, heptane and octane form an ideal solution. At 373 K, the vapour pressure of the two liquid components are 105
κPa abd 45 κPa respectively. Vapour pressure of the solution obtained by mixing 25.0g of heptane and 35 g of octane will be
a. 144.5 κPa
b. 72.0 κPa
c. 36.1 κPa
d. 96. 2 κPa
Ans. b
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