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An acid HA ionises as, HAiffH^(+)+A^- ...

An acid HA ionises as,
`HAiffH^(+)+A^-`
The pH of 1.0 M solution is 5. its dissociation constant would be

A

`1xx10^-10`

B

5

C

`5xx10^-8`

D

`1xx10^-5`

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The correct Answer is:
A
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