MCQ
In $H _2- O _2$ fuel cell the reaction occurs at cathode is:
- ✓$O _{2( g )}+2 H _2 O _{( l )}+4 e ^{-} \longrightarrow 4 OH _{( aq )}^{-}$
- B$H _{( aq )}^{+}+ OH _{( aq )}^{-} \longrightarrow H _2 O _{( l )}$
- C$2 H _{2( g )}+ O _{2( g )} \longrightarrow 2 H _2 O _{( g )}$
- D$H ^{+}+ e ^{-} \longrightarrow \frac{1}{2} H _2$
