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Q.

Calculate mass of the final solution obtained on heating a solution comprising of0.5 moles of urea in 2000 g of H2O to a temperature of 101°C if KbH2O = 0.5 K kg/mole.

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a

250 g

b

280 g

c

1030 g

d

530 g

answer is B.

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Detailed Solution

Change in temperature,

ΔTb=Kb m⇒1=0.5×0.5x×1000x=250

Solution = 250 + 30 = 280 g

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