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Question Paper from: IIT JEE Main 2021 TestSeries Paper 2

The Van't Hoff factor for a 0.1M Al₂(So₄)₃solution is 4.20. The degree of dissociation is

80%

90%

78%

83%

Solution:

Chapter Name: Solutions

Difficulty Level: Moderate

$i = 1 - α + 2 α + 3 α$

$i = 1 + 4 α$

$i = 4.20$

$4.20 = 1 + 4 α$

$4 α = 4.20 - 1$

$4 α = 3.20$

$α = \frac{3.2}{4} = 0.8$

% $\to$ 80%

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IIT JEE Main 2021 TestSeries Paper 2

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