A dilute solution Contains “x” moles of solute “A” in 1 kg of solvent with molal elevation constant kb. The solute dimerises in the solution according to the following equation. The degree of association is α. 2A⇌A2 The von't Hoff factor will be
A
i=1−2α
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B
i=1−α2
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C
i=1+α2
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D
i=1+α
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Solution
The correct option is Bi=1−α2 A dilute solution Contains “x” moles of solute “A” in 1 kg of solvent with molal elevation constant kb. The solute dimerises in the solution according to the following equation. The degree of association is (α) 2A⇌A2 For association i=1+∝(1n−1)