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At 25^(@)C dissociation constants of aci...

At `25^(@)`C dissociation constants of acid HA and base BOH in aqueous solution are same. The pH of 0.01 M solution of HA is 5. The pOH of `10^(-4)` M solution of BOH at the same temperature is :

A

`3.5`

B

4

C

6

D

None of these

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