Question

Which gas is evolved at the anode during the electrolysis of $KH{F}_2$ in anhydrous $HF$?

• A. $F_2$
• B. $H_2$
• C. $O_2$
• D. $H_2$ and $O_2$

Answer 1

Answer: (A)

$F_2$

Electrolysis of $KH{F}_2$ results in the evolution of $H_2$ at cathode and $F_2$ at anode and the two chambers are separated by s diaphragm of teflon so that the two gases don't react.

option A is correct.