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Question

Dimer of acetic acid in liquid benzene is in equilibrium with acetic acid monomer at certain temperature and pressure. If 25% of the dimer molecules are separated out then

A
Freezing point of the solution reduces
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B
Average molar mass of solute increases
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C
Boiling point of solution increases
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D
Molar mass of solute decreases
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Solution

The correct option is D Freezing point of the solution reduces
nC4H10=10.44580.18

m=0.18200×10000.9
ΔTf=5.12×0.94.608
Tf=5.54.6080.892C

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