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Chemistry - Liquid Solution Question with Solution | TestHub

ChemistryLiquid SolutionRaoult's LawEasy2 minPYQ_2020

ChemistryEasysingle choice

The vapour pressure of pure benzene at $25 ° C$ is 640 mm Hg and that of the solute A in benzene is 630 mm of Hg. The molality of solution is

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Answer:

Solution:

$P = P^{o} X_{A}$
$630 = 640 X_{A}$
$X_{A} = \frac{630}{640} = 0.984$
$X_{B} = 0.016$
$m = \frac{X_{B} \times 1000}{X_{A} M_{A}} = \frac{0.016 \times 1000}{0.984 \times 78}$
$= 0.2 m$

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:Liquid SolutionSubtopic:Raoult's Law

⏱ 2mℹ️ Source: PYQ_2020

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