Ammonium Sulfate as a Nitrogen-Rich Fertilizer

Steps:

• Recall ammonium sulfate's formula: (NH₄)₂SO₄, providing nitrogen from ammonium ions.
• Identify plant needs: Nitrogen is key for growth, forming proteins and chlorophyll.
• Evaluate options: Check for accurate nitrogen role and solubility.
• Select best: Match to fertilizer criteria of nutrient supply and usability.

Why B is correct:

• Ammonium sulfate supplies nitrogen (from NH₄⁺) essential for amino acids and plant growth, and its water solubility allows roots to absorb it easily, per fertilizer chemistry.

Why the others are wrong:

• A: Lacks phosphorus; it's only nitrogen and sulfur.
• C: Sulfate provides sulfur, not primarily for pH change.
• D: Doesn't form ammonia with lime; that's for other processes like in the Solvay method.

Final answer: B