Multiple choice general knowledge science & technology

Which of the following is a good fertilizer, and why?

  1. sylvite and gypsum – these are a potassium-bearing and a hydrated mineral, respectively

  2. apatite and sylvite – these are a phosphate and a potassium-bearing mineral, respectively

  3. halite and calcite – these are a salt and a component of cement, respectively

  4. cassiterite and albite – these are an aluminum- and a calcium-bearing mineral, respectively
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fertilizers require essential nutrients: nitrogen, phosphorus (as phosphate), and potassium (potash). Apatite provides phosphate (P), sylvite provides potassium (K). Gypsum is calcium sulfate used in plaster, halite is table salt (NaCl), calcite is in cement, and cassiterite/albite are not fertilizer minerals.

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