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JAMB - Chemistry (2018 - No. 4)
The Sulphide which is insoluble in dilute hydrochloric acid is
FeS
CuS
ZnS
Na2S
Forklaring
Sulphides like PbS (lead (II) sulphide) and CuS (copper (II) sulphide) are insoluble in acidified solutions.
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