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A weak acid is 0.1% ionised in 0.1M solu...

A weak acid is `0.1%` ionised in `0.1M` solution. Its ionisation constant is :

A

`10^(-5)`

B

`10^(-6)`

C

`10^(-8)`

D

`10^(-9)`

Text Solution

Verified by Experts

The correct Answer is:
D
`K_(a) = Calpha^(2) = 0.1 xx ((0.1)/(100))^(2)`
`= 1 xx 10^(-9)`
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