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At 25^(@)C , the molar conductance of 0....

At `25^(@)C` , the molar conductance of 0.007 M hydrofluoric acid is 150 `"mho cm^(2) mol^(-1)` and `^^ _(@) = 500 "mho" cm^(2) mol^(-1)`. The value of the dissociation constant of the acid at the given concentration at `25^(@) C` is _________.

A

`7 xx 10^(-4)`

B

`7 xx 10^(-5)`

C

`9 xx 10^(-3)`

D

`9 xx 10^(-4)`

Text Solution

Verified by Experts

The correct Answer is:
D
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