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0.2 molar solution of formic acid is ion...

0.2 molar solution of formic acid is ionised to an extent of 3.2 % its ionisation constant is

A

`9.6 xx 10^(-3)`

B

`2.1 xx10^(-4)`

C

`1.25 xx 10^(-6)`

D

`2.1 xx10^(-8)`

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The correct Answer is:
B
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