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K(a) for monobasic acid ,whose 0.1M solu...

`K_(a)` for monobasic acid ,whose `0.1M` solution has `pH` of `4.5` is :

A

`10^(-10)`

B

`10^(-8)`

C

`sqrt(10)xx10^(-4)`

D

`sqrt(10)xx10^(-6)`

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RESONANCE-IONIC EQUILIBRIUM-Part -II (only one option correct type)
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  4. For 10^(-4) M BOH (weak base) ,K(b)=5xx10^(-5)):

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