Production And Uses Of Npk Fertilisers (chemistry Only) (GCSE Chemistry)

Which of the following is the correct balanced equation showing production of (single) superphosphate from apatite (simplified) when treated with sulfuric acid?

Which common mined mineral is the usual primary source of potassium for K-containing fertilisers?

Which industrial catalyst is commonly used in the Haber process to increase the rate of ammonia production?

What is a simple laboratory test to show that a soil extract or fertiliser contains nitrate ions?

Which of these salts supplies both nitrogen and phosphorus when used as a fertiliser?

Which one of the following is NOT one of the “big three” macronutrients supplied by NPK fertilisers?

Why can untreated phosphate rock not be used directly as an effective phosphorus fertiliser for most crops?

Fertiliser production question: which two gases are reacted in the Haber process to make the ammonia used for N fertilisers?

What is a primary reason farmers might choose a slow-release or coated nitrogen fertiliser over an immediate-release nitric/ammonium fertiliser?

Which of the following best describes a strategy to reduce environmental damage from phosphorus fertiliser runoff?

If a fertiliser label shows "10-20-10" (N-P-K), what do these numbers mean?