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Chemistry - Liquid Solution Question with Solution | TestHub

ChemistryLiquid SolutionAbnormal Colligatiove PropertiesMedium2 minPYQ_2022

ChemistryMediumsingle choice

Calculate the molar mass of solute when 1.5 gram nonvolatile solute dissolved in $100 mL$ solvent having density $0.8 g mL^{- 1}$ lowers its freezing point by $0.75 K$ . (Freezing point depression constant for solvent is $5 K kg mol^{- 1}$ )

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Answer:

Solution:

$Δ T_{f} = k_{f} \cdot \frac{W _{B}}{M _{B}} \times \frac{1000}{W _{A}} 0.75 = 5 \times \frac{1.5}{M _{B}} \times \frac{1000}{80} M_{B} = 125 g / mol$

Stream:MHT_CETSubject:ChemistryTopic:Liquid SolutionSubtopic:Abnormal Colligatiove Properties

⏱ 2mℹ️ Source: PYQ_2022

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