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The degree of dissociation (alpha) of a ...

The degree of dissociation (`alpha`) of a weak electrolyte `A_x B_y` is related to Van't Hoff factor (i) by the expression

A

`alpha=(i-1)/((x+y-1))`

B

`alpha=(i-1)/(x+y+1)`

C

`alpha=(x+y-1)/(i-1)`

D

`alpha=(x+y+1)/(i-1)`

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The correct Answer is:
A
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