1.

The equivalent conductance of `M//32` solution of a weak monobasic acid is `8.0 ` and at infinite dilution is `400 `. The dissociation constant of this acid is :A. `1.25xx 10^(-4)`B. `1.25xx10^(-5)`C. `1.25 xx 10^(-6)`D. `6.25xx10^(-4)`

Answer» Correct Answer - B
`alpha=(A_(C))/(A_(oo))=(8)/(400)`
`K_(a)=C alpha^(2)`
`=(1)/(32)xx(8)/(400)xx(8)/(400)`
`=1.25xx10^(-5)`


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