Which of the following sulphates is not soluble in water ?
Correct answer: D. Barium sulphate
- A. Sodium sulphate
- B. Potassium sulphate
- C. Zinc sulphate
- D. Barium sulphate
Explanation
Barium sulfate is highly insoluble because its crystal lattice is very stable and hydration does not compensate sufficiently for the energy needed to separate its ions. Sodium, potassium and zinc sulfates are soluble to a useful extent in water. Students may choose zinc sulfate because zinc is a metal, but most zinc salts, including zinc sulfate, are soluble.
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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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