The half-reaction that occurs at the anode' during the electrolysis of molten sodium bromide is

Options

A. `2 Br^(-1) rarr Br_(2) + 2e^(-1)`
B. `Br_(2) + 2e^(-1) rarr 2Br^(-1)`
C. `Na^(+1) + e^(-1) rarr Na`
D. `Na rarr Na^(2+) + e^(-1)`

Answer

A

Explanation

Here anode is positive so it gains negative part of electrolyte or vice-versa