InterviewSolution
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InterviewSolution
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If at certain temperature the vapour pressure of pure water is 25 mm Hg and that of a very dilute aqueous urea solution is 24.5 mm Hg, the molarity of the solution isA. `0.02`B. `1.2`C. `1.11`D. `0.08` |
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Answer» Correct Answer - C `(P^(@)-P_(s))/(P^(@))=(w_(B))/(m_(B))xx(m_(A))/(w_(A)), (w_(B))/(w_(B)xx w_(A))xx1000xx(m)/(1000)` `rArr (P^(@)-P_(s))/(P^(@))=" molality " xx(m)/(1000)` `(25-24.5)/(25)=m xx(18)/(1000)` `m=(0.02xx1000)/(18)=1.11` |
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