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64 g non - volatile solute is added to 7...

64 g non - volatile solute is added to 702 g benzene. The vapour pressure of benzene has decreased from 200 mm of Hg to 180 mm of Hg. Molecular weight of the solute is

A

128

B

64

C

96

D

256

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The correct Answer is:
B
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90 g non - volatile, non - dissociative solution is added to 1746 g water to form a dilute, ideal solution. The vapour pressure of water has decreased from 300 mm of Hg to 291 mm of Hg. The molecular weight of solute is.

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