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20 g of a binary electrolyte (mol. Wt. =...

20 g of a binary electrolyte (mol. Wt. = 100) are dissolved in 500 g of water. The freezing point of the solution is `-0.74^@C`, K = 1.86 k `molality^-1.` The degree of ionization of the electrolyte is:

A

`50%`

B

`75%`

C

`100%`

D

Zero

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The correct Answer is:
D
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