Which of the following reaction is possible at anode ?

Options

A. `2Cr^(3+) + 7H_(2)O rarr Cr_(2)O_(7)^(2-) + 14H^(+)`
B. `F_(2) rarr 2F^(-)`
C. `(1)/(2) O_(2) + 2H^(+) rarr H_(2)O`
D. None of these

Answer

A

Explanation

Properties of ionic solid