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⚡ NEET 2025 ULTIMATE GUIDE | CHEMICAL BONDING
CHEMICAL BONDING - Complete NEET Breakdown
15-Year NEET Trends Analysis + NCERT Based PYQs (2009-2024)
🔬 3 MUST-KNOW FACTS FOR NEET 2025
23
PYQs on VSEPR Theory
100%
Hybridization Qs from NCERT
3x
More H-Bonding Questions in Last 5 Years
⚛️ BONDING CONCEPTS - NEET NCERT Highlights
| Bond Type | Key Concept | NEET Example |
|---|---|---|
| Ionic | Electron transfer (ΔEN > 1.7) | NaCl, CaO (NEET 2018) |
| Covalent | Electron sharing (ΔEN < 1.7) | H₂, CH₄ (NEET 2021) |
| Coordinate | Lone pair donation | NH₄⁺, H₃O⁺ (NEET 2019) |
| Hydrogen | H with F,O,N | DNA, H₂O (NEET 2020, 2023) |
NEET 2025 Tip: Remember Fajan's Rule for covalent character in ionic bonds - asked 5 times in last decade
🧪 VSEPR THEORY
- Basic Principle: Electron pairs repel each other
- Key Shapes: Linear, Trigonal planar, Tetrahedral
- NEET Focus: AXE notation (NEET 2016, 2022)
- Exceptions: Lone pair effects on bond angles
🔬 VALENCE BOND THEORY
- Key Concept: Orbital overlap forms bonds
- Hybridization: sp, sp², sp³, dsp³, d²sp³
- NEET Favorite: Predicting hybridization states (NEET 2018, 2021, 2023)
- Resonance: Delocalization of electrons
⚛️ MOLECULAR ORBITAL THEORY & HYBRIDIZATION
Molecular Orbital Theory
- LCAO: Linear Combination of Atomic Orbitals
- Bond Order: (Nb - Na)/2
- NEET Example: O₂ paramagnetism (NEET 2019)
Hybridization
- sp³: Tetrahedral (CH₄)
- sp²: Trigonal planar (BF₃)
- sp: Linear (BeCl₂)
- NEET Special: d-orbital hybridization (SF₆)
NEET Special: Remember MOT diagram order for N₂ vs O₂ - asked 3 times in last 5 years
📏 BOND PARAMETERS & HYDROGEN BONDING
Bond Parameters:
- Bond Length: Distance between nuclei
- Bond Angle: Angle between bonds
- Bond Enthalpy: Energy to break bond
- NEET Focus: Trends in periodic table (NEET 2021)
Hydrogen Bonding - NEET Pattern:
- Types: Intermolecular vs Intramolecular
- Effects: Boiling point, solubility
- Examples: H₂O, HF, DNA
- NEET Favorite: Anomalous properties of water (NEET 2020)
NEET Must-Know: Difference between dipole-dipole and H-bonding - Asked 4 times in last 5 years
📜 NEET PYQ TRENDS (2014-2024)
2023: What is the hybridization of central atom in XeF₄?
sp³d² (Correct Answer)
2021: Which molecule has the highest dipole moment?
NH₃ (NCERT based)
2019: What is the bond order of O₂⁺?
2.5 (MOT concept)
