Magnesium ribbon was added to each of the following aqueous solution in turn: H2SO4, AgNO3,...

JAMB 1982

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?

A. H₂SO₄
B. AgNO₃
C. HNO₃
D. NH₃
E. HCl

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Correct Answer: Option B

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