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If 8g of a non-electrolyte solute is dissolved in 114g of n-octane to reduce its vapour pressure to 80%, the molar mass (in g mol⁻¹) of the solute is
Question

If 8g of a non-electrolyte solute is dissolved in 114g of n-octane to reduce its vapour pressure to 80%, the molar mass (in g mol⁻¹) of the solute is [Given that molar mass of n-octane is  114g mol⁻¹]

A.

20

B.

40

C.

60

D.

80

Correct option is B

Ans.(b)
Assuming dilute solution

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