Match List-I with List-II
List-I                                     List-II
(A) Cl$$_2$$O$$_7$$                           (I) Amphoteric
(B) Na$$_2$$O                            (II) Basic
(C) Al$$_2$$O$$_3$$                           (III) Neutral
(D) N$$_2$$O                              (IV) Acidic
Choose the correct answer from the options given below

Let us classify each oxide:

(A) $$Cl_2O_7$$ is the anhydride of perchloric acid ($$HClO_4$$). Chlorine is a non-metal, and $$Cl_2O_7$$ is an acidic oxide (IV).

(B) $$Na_2O$$, sodium being an alkali metal, reacts with water to form NaOH (a strong base), so $$Na_2O$$ is a basic oxide (II).

(C) $$Al_2O_3$$ is a classic example of an amphoteric oxide (I), reacting with both acids and bases: $$Al_2O_3 + 6HCl \rightarrow 2AlCl_3 + 3H_2O$$ and $$Al_2O_3 + 2NaOH \rightarrow 2NaAlO_2 + H_2O$$.

(D) $$N_2O$$ (nitrous oxide, laughing gas) is a neutral oxide (III) that does not react with acids or bases to form salts.

The correct matching is (A) - (IV), (B) - (II), (C) - (I), (D) - (III).

Hence, the correct answer is Option B.