1.

Which of the following pairs of cations can be separated by using an NaOH solution?

Answer»

`Cu^(2+), Zn^(2+)`
`Pb^(2+), Al^(3+)`
`Sn^(2+), Pb^(2+)`
`Zn^(2+), Hg_(2)^(2-)`

ANSWER :A


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