The tatal number of reactions that show oxidation is
i.`2H_(aq)^+ to H_(2(g))`
ii.`Zn_((s)) to Zn_((aq))`
iii.`Cu_((aq))^(2+)to Cu_((s))`
iv.`F_(2g) to 2F_((aq))^-`
v.`AI_((aq))^(3+) to AI_((s))`
vi. `Ag_(s) to Ag_((aq))^+`

Answer

2

Explanation

Half reactions ii and vi involve loss of electrons and hence, they are oxidation half reactions.