A 5% solution(by mass) of cane sugar in water has freezing point of 271k and freezing point of pure water is 273.15k. The freezing point of a 5% solution (by mass) of glucose in water is
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a
271k
b
273.15k
c
269.07k
d
277.23k
answer is B.
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Detailed Solution
FP of pure water = 273.15KFP of 5% (W/W) C12H22O11(aq.) = 271KFP of 5% (W/W) C6H12O6(aq.) = ? the solvent is water in both casesBy comparing Sucrose and glucose solutions; both are 5% by mass Tf = FP of glucose sol. =273.15 - 4.085 =269.07K