Match each of the following oxides with its correct chemical classification and characteri… — JAMB UTME

Match each of the following oxides with its correct chemical classification and characteristic chemical behavior.

Dinitrogen monoxide ( $\text{N}_2\text{O}$ )Neutral oxide that exhibits no acid-base properties and does not form salts with acids or alkalis.
Barium peroxide ( $\text{BaO}_2$ )True peroxide containing the $\text{O}_2^{2-}$ ion, reacting with cold dilute acids to yield hydrogen peroxide ( $\text{H}_2\text{O}_2$ ).
Lead(IV) oxide ( $\text{PbO}_2$ )Dioxide containing oxidation state +4, acting as a strong oxidizing agent and liberating chlorine gas when heated with concentrated hydrochloric acid.
Aluminium oxide ( $\text{Al}_2\text{O}_3$ )Amphoteric oxide that reacts with both aqueous acids and strong bases to form salts and water.

Answer

Dinitrogen monoxide matches as a neutral oxide; Barium peroxide matches as a true peroxide producing hydrogen peroxide with cold dilute acid; Lead(IV) oxide matches as a dioxide acting as an oxidizing agent to liberate chlorine gas from concentrated hydrochloric acid; Aluminium oxide matches as an amphoteric oxide reacting with both acids and bases.

The correct pairings accurately distinguish between oxide classes: dinitrogen monoxide is neutral, barium peroxide contains the peroxide anion yielding hydrogen peroxide with dilute acids, lead(IV) oxide is a dioxide acting as an oxidizing agent with concentrated hydrochloric acid, and aluminium oxide displays amphoteric properties by reacting with both acids and bases.

Step-by-Step Solution

Analyze Dinitrogen monoxide (

\text{N}_2\text{O}

)

Identify that oxides of non-metals like

\text{N}_2\text{O}

and

\text{CO}

are neutral and do not form salts with acids or bases.

Classification based on acid-base reactivity.

Differentiate between peroxides and dioxides using Barium peroxide (

\text{BaO}_2

) and Lead(IV) oxide (

\text{PbO}_2

)

True peroxides like

\text{BaO}_2

contain the

\text{O}_2^{2-}

ion and produce

\text{H}_2\text{O}_2

with dilute acid. Dioxides like

\text{PbO}_2

contain metal in +4 oxidation state and act as oxidizing agents, yielding

\text{Cl}_2

gas with concentrated

\text{HCl}

Oxidation state analysis and chemical reaction product test.

Analyze Aluminium oxide (

\text{Al}_2\text{O}_3

)

Determine that metallic oxides of group 13 like

\text{Al}_2\text{O}_3

dissolve in both acids (forming

\text{Al}^{3+}

salts) and strong bases (forming aluminate complex salts), confirming amphoterism.

Amphoteric nature of specific metal oxides.

Key Concept

Classification of oxides (acidic, basic, amphoteric, neutral, peroxides, and dioxides)

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