NEET Chemistry Formula PDF for Entrance Exam

The NEET entrance exam requires a strong understanding of chemistry, and formulas play a crucial role in solving numerical problems efficiently. A well-structured NEET Chemistry Formula PDF helps students revise essential formulas and concepts quickly, ensuring better retention and problem-solving skills.

This guide covers the important formulas from Physical, Organic, and Inorganic Chemistry, categorized systematically to make learning easier for NEET aspirants.

Key Features of NEET Chemistry Formula PDF

• Comprehensive list of essential formulas for quick revision.

• Covers Physical, Organic, and Inorganic Chemistry systematically.

• Helps in quick problem-solving and last-minute revision.

• Useful for NEET aspirants and other entrance exams.

Physical Chemistry Formulas

Atomic Structure

• Bohr’s Energy Levels
  The energy of an electron in the nth orbit is given by:
  Eₙ = - 13.6/n² eV

• De Broglie Wavelength
  The wavelength of a moving particle is:
  λ = h/mv

• Heisenberg Uncertainty Principle
  The uncertainty in position and momentum is given by:
  Δx • Δp ≥ h/4π

Thermodynamics

• First Law of Thermodynamics
  The change in internal energy is given by:
  ΔU = Q - W

• Gibbs Free Energy
  Determines spontaneity of a reaction:
  ΔG = ΔH - TΔS

• Enthalpy Change in a Reaction
  ΔH = ΣΔH(products) - ΣΔH(reactants)

Chemical Equilibrium

• Le Chatelier’s Principle
  Describes the effect of changes in concentration, pressure, and temperature on equilibrium.

Organic Chemistry Formulas

General Organic Chemistry

• Hybridization of Carbon

  • sp³ → Tetrahedral (109.5°)

  • sp² → Trigonal Planar (120°)

  • sp → Linear (180°)

Reaction Mechanisms

• SN1 vs SN2 Reaction

  • SN1: Unimolecular, two-step mechanism forming a carbocation.

  • SN2: Bimolecular, single-step mechanism involving a backside attack.

• Aldol Condensation
  Aldehydes and ketones react in the presence of a base to form β-hydroxy aldehydes/ketones.

Important Name Reactions

• Cannizzaro Reaction
  Disproportionation of non-enolizable aldehydes to form alcohol and carboxylic acid.

• Wurtz Reaction
  Alkyl halides react with sodium metal in dry ether to form higher alkanes.

Inorganic Chemistry Formulas

Periodic Table Trends

• Electronegativity
  Increases across a period and decreases down a group.

• Atomic Size
  Decreases across a period and increases down a group.

Coordination Compounds

• Werner’s Theory
  Defines primary and secondary valencies, explaining coordination numbers of metal ions.

• Crystal Field Splitting Energy (Δ)

  • Strong Field Ligand → Low spin complex

  • Weak Field Ligand → High spin complex

Important Compounds and Reactions

• Ostwald Process for Nitric Acid
  4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

• Contact Process for Sulfuric Acid
  2 SO₂ + O₂ → 2 SO₃

Benefits of Using NEET Chemistry Formula PDF

• Quick Revision – Ideal for last-minute preparation.

• Saves Time – Helps in fast recall during exams.

• Boosts Accuracy – Reduces errors in calculations.

• Covers All NEET Topics – Includes formulas from Physical, Organic, and Inorganic Chemistry.

This NEET Chemistry Formula PDF is a valuable resource for aspirants aiming to strengthen their chemistry concepts and improve their exam performance.