Question

XeF2, NO2, HCN, ClO2, CO2 Identify the non-linear molecule-pair from the above mentioned molecules.

• A. XeF2, CIO2
• B. CO2, NO2
• C. HCN. NO2
• D. CIO2, NO2

Answer 1

The Correct Option is D

To determine the non-linear molecule-pair, let's analyze the molecular geometries of each compound using VSEPR (Valence Shell Electron Pair Repulsion) theory:

1. XeF₂: Xenon difluoride has a linear geometry. The central xenon atom has 2 bonding pairs and 3 lone pairs of electrons, leading to a linear structure. 

2. NO₂: Nitrogen dioxide has a bent or V-shaped geometry. The nitrogen atom has 2 bonding pairs and 1 lone pair, resulting in a non-linear shape. 

3. HCN: Hydrogen cyanide is a linear molecule. The carbon is triple-bonded to nitrogen and single-bonded to hydrogen, leading to a straight-line structure. 

4. ClO₂: Chlorine dioxide has a bent geometry due to 2 bonding pairs and 1 lone pair on the central chlorine atom. 

5. CO₂: Carbon dioxide has a linear geometry. The carbon atom is double bonded to two oxygen atoms, forming a straight line. 

Now, let's identify the non-linear pairs: 
- XeF₂ is linear. 
- CO₂ is linear. 
-HCN is linear.
-NO₂ is non-linear (bent). 
- ClO₂ is non-linear (bent). 

Answer: ClO₂, NO₂