Complete the following reactions
(i) `O_(2)^(2-)+H_(2)O rarr` (ii) `O_(2)^(-) +H_(2)O rarr`

Explanation

( a) `Pbs(s) O_3 rarr PbSO_4+O_2`
(ii)`XeF_6+NaF rarr Na+XeF_7`
( b) See Q.29 (or) (b) (i) Paper - 2014 ( C) Delhi Board ,Set-I[page 263]
(ii)`HF lt HCl lt HBr` Hi the size of halogens is incresing sdown the group so due to a large size difference between halogen and hydrogen , the compound can easily loose proton and this character of loosing proton depicts its acidity.