Which of the following are examples of soluble anions?

Soluble anions are negatively charged ions that readily dissolve in water, making them available for plant uptake. Chloride, nitrate, and sulfate are all examples of anions that are highly soluble in water.

Chloride, for instance, is known for its high mobility in soil and is taken up by plants where it plays a role in processes such as osmosis and photosynthesis. Nitrate is a crucial nutrient for plants as it is a major source of nitrogen, essential for amino acids and proteins. Sulfate is similarly vital, providing sulfur which is necessary for the synthesis of certain amino acids and vitamins. Their solubility in water facilitates easy transport within the soil solution, allowing plants to absorb them effectively through their root systems.

In contrast, other choices include combinations of elements and ions that do not fit the criteria for soluble anions, such as certain cations and some less soluble anions, preventing them from being classified as examples of soluble anions.