Question bank/JEE Main/Chemistry

The vapour pressure of benzene at a certain temperature is 640
mm of Hg. A non-volatile and non-electrolyte solid weighing 2.175
g is added to 39.08 g of benzene. The vapour pressure of the
solution is 600 mm of Hg. What is the molecular weight of solid
substance?

A49.50B59.6C69.5D79.8

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[IMAGE] m = 69.

Source: Grass-G / CH-13 Chemistry Paper 4 Nov..docx