The values of limiting ionic conductance...

The values of limiting ionic conductance of H+ and HCOO- ions are respectively 347 and 53 S cm2 mol−1 at 298K. If the molar conductance of 0.025M methanoic acid at 298K is 40 S cm2 mol-1 the dissociation constant of methanoic acid at 298K is

`1xx10^-5`

`2.5xx10^-4`

`2.5xx10^-5`

`2xx10^-5`

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