`NH_4 CNS` can be used to test one or more out of `Fe^(3+), Co^(2+), Cu^(2+)e`A. `Fe^(3+)` onlyB. `Co^(2+),Cu^(2+)`C. `Fe^(3+),Cu^(2+)`D. All

`NH_4 CNS` can be used to test one or more out of `Fe^(3+), Co^(2+), C

1.	`NH_4 CNS` can be used to test one or more out of `Fe^(3+), Co^(2+), Cu^(2+)e`A. `Fe^(3+)` onlyB. `Co^(2+),Cu^(2+)`C. `Fe^(3+),Cu^(2+)`D. All
Answer» `CoCl_(2)+4NH_(4)CNS overset("ether")tounderset("in ethereal layer")underset("Blue colour")((NH_(4))_(2)[Co(CNS)_(4)])+2NH_(4)Cl` `FeCl_(3) +3NH_(4)CNS to underset("Blood red colour")(Fe(CNS)_(3))+3NH_(4)Cl`

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`NH_4 CNS` can be used to test one or more out of `Fe^(3+), Co^(2+), Cu^(2+)e`A. `Fe^(3+)` onlyB. `Co^(2+),Cu^(2+)`C. `Fe^(3+),Cu^(2+)`D. All

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