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Q.

The freezing point of a solution containing 50 cm3 of ethylene glycol in 50 g of water is found to be −34oC. Assuming ideal behaviour, calculate the density of ethylene glycol (Kf for water = 1.86 K kg mol-1)

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a

1.13 g/cm3

b

2.00 g/cm3

c

1.8 g/cm3

d

2.25 g/cm3

answer is A.

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Detailed Solution

ΔTf=Kf×w×1000m×W34=1.86×w×100062×50w=56.66 gV=wd50=56.66dd=1.13 g/cm3
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