At 25°C, the molar conductance of 0.007 M hydrofluoric acid is 150 mho cm^2mol^{–1} and m \Lambda^\circ_m = 500 mho cm^2mol^{–1}. Thevalue of the dissociation constant of the acid at the gas concentration at 25°C is

Correct Answer is : 9 × 10−4 M

WBJEE 2014 Chemistry Solved Paper

Question : 49 of 60

Marks: +1, -0

At 25°C, the molar conductance of 0.007 M hydrofluoric acid is 150 mho cm2mol–1 and m Λ°m = 500 mho cm2mol–1. Thevalue of the dissociation constant of the acid at the gas concentration at 25°C is

7 × 10−4 M
7 × 10−5 M
9 × 10−3 M
9 × 10−4 M

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