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If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2.5K rise in the boiling point of the solution is……….molal.Kb=0.52 K kg mol−1 )

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answer is 3.

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Detailed Solution

ΔTf=i×kf×mα=i-1n-1,0.75=i-12-1,i=1.75,2.5=1.75×0.52×m, m=2.74

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If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2.5K rise in the boiling point of the solution is……….molal.Kb=0.52 K kg mol−1 )