Which of the following pairs of species are both isoelectronic and isostructural?

Given species: NO₃⁻, CO₃²⁻, ClO₃⁻ and SO₃

1. NO₃⁻ and CO₃²⁻

2. SO₃ and NO₃⁻

3. ClO₃⁻ and CO₃²⁻

4. CO₃²⁻ and ClO₃⁻

Subtopic:  Types of Chemical Bond |
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Level 2: 60%+
NEET - 2016
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