1.

Which of the following sets contain only isoelectionic ions?

Answer»

<P>`Zn^(2+),Ca^(2+),Ga^(3+),Al^(3+)`
`K^(+),Ca^(2+),Sc^(3+),Cl^(-)`
`P^(3-),S^(2-),Cl^(-),Al^(3+)`
`Ti^(4+),AR,Cr^(3+),V^(5+)`

Answer :b


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