JAMB - Chemistry (2019 - No. 75)
A solution X, on mixing with AgNO\(_3\) solution gives a white precipitate soluble in aqueous NH\(_3\), a solution Y, when also added to X, also gives a white precipitate which is soluble when heated solutions X and Y respectively contain
Al\(^{3+}\), Cl\(^-\)
Hg\(^+\), SO\(_4 ^{2-}\)
Pb\(^{2+}\), Cl\(^-\)
Ag\(^+\), SO\(_4 ^{2-}\)
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