Oxide Classification by Reactivity

Steps:

• Recall that basic oxides (e.g., from Group 1/2 metals) react only with acids.
• Amphoteric oxides (e.g., Al, Zn oxides) react with both acids and bases.
• Acidic oxides (e.g., non-metal oxides) react only with bases.
• Match Q, R, T properties to these definitions using given reactivity data.

Why D is correct:

• D aligns Q as basic (reacts only with acid), R as amphoteric (reacts with both), T as acidic (reacts only with base), per oxide behavior definitions.

Why the others are wrong:

• A misclassifies Q as amphoteric instead of basic.
• B swaps acidic and basic for Q and T.
• C incorrectly labels R as acidic, ignoring its dual reactivity.

Final answer: D