JEE Main 2015 Question Paper

Section: Chemistry

Question : 26 of 90

Marks: +1, -0

The vapour pressure of acetone at 20°C is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20°C, its vapour pressure was 183 torr. The molar mass (g‌mol−1) of the substance is:

[Main 2015]

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