What is the color of copper sulfate crystalline?
Correct answer: C. Blue
- A. White
- B. Brown
- C. Blue
- D. Green
Explanation
Crystalline copper sulfate is commonly encountered as hydrated copper sulfate, CuSO4·5H2O, whose crystals are bright blue because of the coordinated water molecules around copper ions. Anhydrous copper sulfate is white, so students who overlook hydration may choose option a.
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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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