`NH_(4)SCN` can be used to test one or more out of `Fe^(3+) , Co^(2+) , Cu^(2+)`:A. `Fe^(3+)` onlyB. `Co^(2+), Cu^(2+)` onlyC. `Fe^(3+), Cu^(2+)` onlyD. All

`NH_(4)SCN` can be used to test one or more out of `Fe^(3+) , Co^(2+)

1.	`NH_(4)SCN` can be used to test one or more out of `Fe^(3+) , Co^(2+) , Cu^(2+)`:A. `Fe^(3+)` onlyB. `Co^(2+), Cu^(2+)` onlyC. `Fe^(3+), Cu^(2+)` onlyD. All
Answer» Correct Answer - D `Fe^(3+) +3SCN^(-) to Fe(SCN)_(3)` (deep red colouration) `Co^(2+) +4SCN^(-) overset("amyl alcohol") to [Co(SCN)_(4)]^(2-)` (blue colouration) `Cu^(2+) + 2SCN^(-) to Cu(SCN)_(2) darr ("black"),2Cu(SCN)_(2) to 2CuSCN darr ("white")+(SCN)_(2)`

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`NH_(4)SCN` can be used to test one or more out of `Fe^(3+) , Co^(2+) , Cu^(2+)`:A. `Fe^(3+)` onlyB. `Co^(2+), Cu^(2+)` onlyC. `Fe^(3+), Cu^(2+)` onlyD. All

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