Magnesium ribbon was added to each of the following aqueous solution in turn: H2SO4, AgNO3, HNO3, HCl, NH3, HCl, NH3. In which case does the magnesium become covered with a dark precipitate?

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Magnesium ribbon was added to each of the following aqueous solution in turn: H2SO4, ...

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Magnesium ribbon was added to each of the following aqueous solution in turn: H₂SO₄, AgNO₃, HNO₃, HCl, NH₃, HCl, NH₃. In which case does the magnesium become covered with a dark precipitate?

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A H₂SO₄
B AgNO₃
C HNO₃
D NH₃
E HCl

Correct Answer: Option B

Explanation:

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