Q59 · CSIR-NET Chemistry, June 2011

Paper: CSIR-NET June 2011 · Subject: Inorganic Chemistry · Chapter: Chemical Bonding · Topic: MO Theory Diatomics · Marks: 2 · Difficulty: Medium

The molecule with highest number of lone-pairs and has a linear shape based on VSEPR theory is:

(a)$\mathrm{CO}_{2}$

(b)$\mathrm{I_3^{-}}$

(c)$\mathrm{NO}_{2}^{-}$

(d)$\mathrm{NO}_{2}^{+}$

Answer

Answer: B ✓ checked by 4AB · confidence high

Explanation

I₃⁻ is linear and carries 9 lone pairs (3 on the central I, 3 on each terminal I). CO₂ has 4, NO₂⁺ has 4, and NO₂⁻ is bent (b).

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