1.

Which of the following set has all the ions coloured ?

Answer»

`Cu^(2+),Fe^(2+), Co^(2+)`
`Cu^(2+), Sc^(3+), Mg^(2+)`
`Al^(3+), Zn^(2+), Co^(2+)`
`Fe^(3+), Sc^(3+), NI^(2+)`

ANSWER :A


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