Chemistry - Liquid Solution Question with Solution | TestHub

ChemistryLiquid SolutionAbnormal Colligatiove PropertiesMedium2 minPYQ_2023

ChemistryMediumsingle choice

How much ethyl alcohol must be added to 1 litre of water so that the solution will freeze at $1 4^{\circ} C$ ?
$(K_{f}$ for water $= 1.8 6^{\circ} C / mol)$

Options:

Answer:

Solution:

$7.5 mol$
$Δ T_{f} = K_{f} m$
$Δ T_{f} = K_{f} \frac{n _{2} \times 1000}{w _{1}}$
$\Rightarrow 14 = 1.86 \times \frac{n _{2} \times 1000}{1000}$
$n_{2} = 7.5 mol$

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

⏱ 2mℹ️ Source: PYQ_2023

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