UP BOARD CHEMISTRY: HIGH-IMPACT ROADMAP (2026)

[cite: 1, 6] PHYSICAL CHEMISTRY SECTION | TOTAL WEIGHTAGE: 22 MARKS

UNIT 1: SOLUTIONS (विलयन) 08 MARKS

[cite: 3, 4, 6] Setter's Insight: Is chapter se kam se kam ek 5-marks ka numerical fix hota hai jo Colligative Properties aur Van't Hoff Factor ko mix karke pucha jata hai.

1. Colligative Properties (अणुसंख्य गुणधर्म) - 4-5 Marks

[cite: 11] Kya Padhe: Raoult's Law for relative lowering of vapour pressure, Elevation of B.P., aur Depression of F.P..

Depression of Freezing Point (Numerical King) $$\Delta T_f = i \cdot K_f \cdot m$$ Where $i$ is Van't Hoff factor and $m$ is molality [cite: 11]

2. Van't Hoff Factor & Abnormal Molar Mass

[cite: 11] Concept: Association aur Dissociation ke liye 'i' ki value calculate karna seekhein.

3. Henry's Law

[cite: 11] PYQ Predictor: "Scuba divers use Helium mixed oxygen why?" (Henry's Law application) ya Ideal vs Non-Ideal solution ke beech antar.

UNIT 2: ELECTROCHEMISTRY (वैद्युत रसायन) 07 MARKS

[cite: 6, 14] Setter's Insight: Nernst Equation ke bina paper nahi banta. Is saal 'Fuel Cell' aur 'Corrosion' mechanism par theory question aane ke high chances hain.

1. Nernst Equation & Gibbs Energy - 3-4 Marks

Cell Potential Calculation $$E_{cell} = E^\circ_{cell} - \frac{0.0591}{n} \log \frac{[\text{Product}]}{[\text{Reactant}]}$$ Gibbs Free Energy $$\Delta G^\circ = -nFE^\circ_{cell}$$ [cite: 14]

2. Kohlrausch Law

[cite: 14] Must Do: Numerical on calculating limiting molar conductivity ($\Lambda^\circ_m$) for weak electrolytes like Acetic Acid.

[Image of conductivity cell] 3. Corrosion & Fuel Cells

[cite: 14] Theory: Lead Storage Battery (सीसा संचायक सेल) ki charging/discharging reactions aur electrochemical rusting mechanism.

UNIT 3: CHEMICAL KINETICS (रासायनिक बलगतिकी) 07 MARKS

[cite: 6, 18] Setter's Insight: Syllabus mein sirf **Zero** aur **First Order** hai. Second order ke derivations mat padhna.

1. Integrated Rate Equations (First Order) - 4 Marks

Rate Constant for 1st Order $$k = \frac{2.303}{t} \log \frac{[A]_0}{[A]}$$ Half-Life Relation $$t_{1/2} = \frac{0.693}{k}$$ [cite: 18]

2. Activation Energy (Arrhenius Equation)

Temperature Dependence $$\log \frac{k_2}{k_1} = \frac{E_a}{2.303R} \left[ \frac{T_2 - T_1}{T_1 T_2} \right]$$ [cite: 18]

3. Order vs Molecularity

[cite: 17] Revision: "Distinguish between Order and Molecularity." Ye 2 marks ka classic question hai.

SETTER'S FINAL VERDICT FOR FEB 18

In 3 chapters se aap 22 marks secure kar sakte ho. Numerical practice ke liye sirf NCERT Solved Examples karo, UP Board pattern kabhi change nahi hota[cite: 4].