Question

Phosphorus is mostly found in rocks in a combination with

• A. Calcium
• B. Iron
• C. Aluminium
• D. All of the above

Answer 1

The correct option is D All of the above

Phosphorus is usually present in rocks as phosphates of metals like calcium, iron and aluminium. Thus, salts like aluminium phosphate, calcium phosphate and iron phosphates are the most important reservoirs of phosphorus in nature. Thus, the correct answer is option D.