The general name of ore CaSO4.2H2O is:
Correct answer: A. Gypsum
- A. Gypsum
- B. Dolomite
- C. Calcite
- D. Plaster of Paris
Explanation
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4.2H2O. Thus, option A is correct.
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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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