Arrange as directed: (i) `SiO_(2),NO_(2),Al_(2)O_(3),CiO_(2)` (Increasing acidic property)
(ii) `Na^(+),Al^(3+),F^(-),Cl^(-)`
(increasing ionic radius).

Explanation

(i) `Al_(2)O_(3) lt SiO_(2) lt NO_(2) lt ClO_(2)`
(ii) `Al^(3+) lt Na^(+) lt F^(-) lt Cl^(-)`.