Chemistry

Question Analysis
This question involves VSEPR theory and evaluating whether the molecular geometries assigned to different molecules are correct.

Key Concept Explanation
According to VSEPR theory, electron pairs around a central atom repel each other and arrange themselves as far apart as possible to minimize repulsion.
The molecular geometry depends on: 1. The number of electron domains (bonding + lone pairs). 2. Whether lone pairs are present.

Option Analysis

1. CO₂: Linear
Correct. The central C atom forms two double bonds with O atoms. → Electron domains = 2 bonding domains + 0 lone pairs → Linear
2. SiH₄: Tetrahedral
Correct. The central Si atom forms four single bonds with H atoms. → Electron domains = 4 bonding pairs + 0 lone pairs → Tetrahedral
3. ClF₃: Trigonal planar
Incorrect. The central Cl ato...