Which is sold as fertilizer ___________________?
Correct answer: C. Ca3(PO4)2
- A. CaSiO3
- B. Na2SiO3
- C. Ca3(PO4)2
- D. MnSiO3
Explanation
Calcium phosphate, Ca3(PO4)2, is a source of phosphorus and is used as a phosphate fertiliser. The likely alternative is calcium silicate, but silicates are mainly associated with slags, cement and glass rather than being the standard fertiliser listed here.
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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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