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20 g of a biaryelectrolyte (Molecular ma...

20 g of a biaryelectrolyte (Molecular mass =100) are dissolved in 500 g of water. The freezing point of the solution is `-0.74^(@)C` and `K_(f)=1.86` K kg `mol^(-1)`. The degree of ionisation of eletrolyte as :

A

0.5

B

0.75

C

1

D

Zero

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