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1. |
A solution containing 30 gms of non-volatile solute in exactly 90 gm water has a vapour pressure of 21.85 mm Hg at \[{{25}^{o}}C\]. Further 18 gms of water is then added to the solution. The resulting solution has a vapour pressure of 22.15 mm Hg at \[{{25}^{o}}C\]. Calculate the molecular weight of the solute [UPSEAT 2001] |
A. | 74.2 |
B. | 75.6 |
C. | 67.83 |
D. | 78.7 |
Answer» D. 78.7 | |