CO2 is isostructural with:
Correct answer: D. NO2
- A. HgCl2
- B. SnCl2
- C. C2H2
- D. NO2
Explanation
NO2: This option is correct. NO2 (nitrogen dioxide) has a linear molecular geometry and is isostructural with CO2. Both molecules have a central atom bonded to two surrounding atoms with no lone pairs, resulting in a linear shape. Therefore, the correct option is "NO2" as it is isostructural with CO2, meaning they have the same molecular geometry of linear shape.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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Valence shell electron pair repulsion theory predicts molecular shape by arranging bonding pairs and lone pairs around a central atom to minimize repulsion. Questions cover linear, trigonal planar, tetrahedral, trigonal bipyramidal and octahedral electron geometries, bond angles and distortions caused by lone pairs. Electron geometry is not always the same as molecular shape.
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