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Q.

If at certain temperature, the ;pour pressure of pure water is 25 mm of Hg and that of a very dilute aqueous urea solution is 24.5 mm of Hg, the molality of solution is

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a

0.02

b

1.2

c

1.11

d

0.08

answer is C.

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Detailed Solution

By using the relation, molality =po-psp×1000MMolality (m)=25-24.525×100018=0.525×100018=1.11 ∴    Molality of solution - 1.11 m
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