Which of the following sets contain only isoelectronic ions?

Chemistry · JEE Advanced · NTA Exams — Classification of Elements and Periodicity in Properties

1. Zn²⁺ , Ca²⁺ , Ga³⁺ , Al³⁺
2. K⁺ , Ca²⁺ , Sc³⁺ , Cl^–
3. P^3– , S^2– , Cl^– , K⁺
4. Ti⁴⁺ , Ar , Cr³⁺ , V⁵⁺

Answer

(B) K + , Ca 2+ , Sc 3+ , Cl –, (C) P 3– , S 2– , Cl – , K +

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