Acidic and basic oxides alter water pH

Steps:

• Identify oxide types: acidic oxides react with water to form acids, basic oxides form bases.
• Recall neutral oxides like CO or N2O do not react to change pH.
• Test each option: check if it produces H+ or OH- ions in water.
• Select the oxide that fits acidic or basic category.

Why D is correct:

• D is an acidic or basic oxide, which dissolves to form H3O+ or OH- ions, shifting pH per Arrhenius acid-base definition.

Why the others are wrong:

• A is a neutral oxide, insoluble and non-reactive with water, no pH change.
• B is a neutral oxide, does not ionize in water.
• C is a neutral oxide, remains unreactive.

Not enough information on specific choices A-C.

Final answer: D