JEE Mains Model Paper 7

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Question : 53 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 wasdissolved in 100 g of acetone at 20°C, its vapour pressure was 183 torr. The molar mass (g mol1) ofthe substance is:
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