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JAMB - Chemistry (1982 - No. 37)
Magnesium ribbon was added to each of the following aqueous solution in turn: H
2
SO
4
, AgNO
3
, HNO
3
, HCl, NH
3
, HCl, NH
3
. In which case does the magnesium become covered with a dark precipitate?
H
2
SO
4
AgNO
3
HNO
3
NH
3
HCl
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