Gypsum is applied to the soil as a source of________________?
Correct answer: C. Ca and S
- A. Ca and P
- B. S and P
- C. Ca and S
- D. we could not apply
Explanation
Gypsum is calcium sulfate dihydrate, CaSO4.2H2O, so it supplies calcium and sulfur to soil. It is not a useful source of phosphorus because its formula contains no phosphorus. Students may choose calcium and phosphorus by confusing gypsum with a phosphate fertilizer.
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About Reactions of Group II Elements
Group II reactions cover the behaviour of beryllium, magnesium, calcium, strontium and barium with water, oxygen, halogens, acids and nitrogen. The trends in reactivity, hydroxide solubility and basicity, along with the thermal decomposition of carbonates and nitrates, depend on increasing atomic size down the group.
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