The hydroxide of which metal ion is soluble in excess of sodium hydroxide solution:
The hydroxide of which metal ion is soluble in excess of sodium hydroxide solution:
A. `Fe^(3+)`
B. `Cr^(3+)`
C. `Sn^(2+)`
D. `Cu^(2+)`
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Correct Answer - B::C
`Sn(OH)_(2)+4OH^(-)+H_(2)Oto[Sn(OH)_(6)]^(4-)` (soluble complex)
`Cr(OH)_(3)+3OH^(-) to [Cr(OH)+_(6)]^(3-)`
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