Blue vitriol is chemically___________________?
Correct answer: A. Copper sulphate
- A. Copper sulphate
- B. Ferrous sulphate
- C. Copper nitrate
- D. Aluminium sulphate
Explanation
Blue vitriol is the common name for hydrated copper(II) sulphate, usually written CuSO₄·5H₂O, whose blue crystals give it the name. Ferrous sulphate is green vitriol, a common source of confusion.
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