NEET 2027 cheat sheet for Physical Chemistry! 📱 Practice 1 Lakh+ PYQs on ExamBhai.com! - Free Study Material

NEET Physical Chemistry High-Yield Formula Sheet

Physical Chemistry in NEET tests numerical problem-solving, formula application, and conceptual clarity. This concise chapter summary covers high-weightage formulas and principles vital for quick revision.

1. Some Basic Concepts of Chemistry

• Molarity (\(M\)): \(M = \frac{n_{\text{solute}}}{V_{\text{solution (in L)}}}\)
• Molality (\(m\)): \(m = \frac{n_{\text{solute}}}{W_{\text{solvent (in kg)}}}\)
• Ideal Gas Equation: \(PV = nRT\)

2. Structure of Atom

• Bohr Radius: \(r_n = 0.529 \cdot \frac{n^2}{Z} \text{ \AA}\)
• Energy of Electron: \(E_n = -13.6 \cdot \frac{Z^2}{n^2} \text{ eV/atom}\)
• de Broglie Wavelength: \(\lambda = \frac{h}{p} = \frac{h}{mv}\)

3. Chemical Thermodynamics

• First Law of Thermodynamics: \(\Delta U = q + w\)
• Work Done in Reversible Isothermal Process: \(w = -2.303 nRT \log_{10} \bigl(\frac{V_2}{V_1}\bigr)\)
• Gibbs Free Energy & Spontaneity: \(\Delta G = \Delta H - T \Delta S\)

4. Chemical & Ionic Equilibrium

• Relation between \(K_p\) and \(K_c\): \(K_p = K_c (RT)^{\Delta n_g}\)
• pH Formula: \(\text{pH} = -\log_{10} [H^+]\)
• Henderson-Hasselbalch Equation (Acidic Buffer): \(\text{pH} = \text{pK}_a + \log_{10} \bigl(\frac{[\text{Salt}]}{[\text{Acid}]}\bigr)\)

5. Electrochemistry & Solutions

• Nernst Equation: \(E_{\text{cell}} = E^0_{\text{cell}} - \frac{0.0591}{n} \log_{10} Q\)
• Raoult's Law (Relative Lowering of Vapour Pressure): \(\frac{P^0 - P_s}{P^0} = X_{\text{solute}}\)

Example Organic Intermediate for Reaction Kinetics:

```smiles CC(C)(C)Br ```