Q41 · CSIR-NET Chemistry, December 2012
Paper: CSIR-NET December 2012 · Subject: Inorganic Chemistry · Chapter: Chemical Bonding · Topic: Chemical Bonding – General · Marks: 2 · Difficulty: Easy
Which ones among $\mathrm{CO_3^{2-}}$, $\mathrm{SO_3}$, $\mathrm{XeO_3}$ and $\mathrm{NO_3^{-}}$, have planar structure?
(a)$\mathrm{CO_3^{2-}}$, $\mathrm{SO_3}$ and $\mathrm{XeO_3}$
(b)$\mathrm{SO}_{3}, \mathrm{XeO}_{3}$ and $\mathrm{NO}_{3}^{-}$
(c)$\mathrm{CO_3^{2-}}$, $\mathrm{XeO_3}$ and $\mathrm{NO_3^{-}}$
(d)$\mathrm{CO_3^{2-}}$, $\mathrm{SO_3}$ and $\mathrm{NO_3^{-}}$
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
CO₃²⁻, SO₃ and NO₃⁻ are planar; XeO₃ is pyramidal (d).
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