CBSE Class 12 Chemistry Exam Tomorrow: Last-Minute Checklist and Top Tips

With the CBSE Class 12 Chemistry board exam scheduled for February 28 from 10:30 am to 1:30 pm, strategic preparation can turn this high-scoring subject into a marks booster through NCERT mastery and focused revision.

Priority Chapters

Target these high-weightage units first: Solutions, Electrochemistry, Chemical Kinetics (Physical: 23 marks); Alcohols, Phenols & Ethers, Aldehydes, Ketones & Carboxylic Acids, Amines (Organic: 26 marks); Coordination Compounds, d- and f-Block Elements (Inorganic: 14 marks). Never skip Electrochemistry, Chemical Kinetics, Coordination Compounds, Aldehydes & Ketones, and Amines even if time-crunched.

Exam Strategies

Read questions carefully, especially Organic conversions; write reactions with reagents/conditions, intermediates.

Inorganic: Use exact NCERT phrasing; mention name reactions.

Numericals: Formula first, substitute with units, correct significant figures; balance equations.

Reasoning: Cite electronegativity, resonance, +I/-I effects, hydrogen bonding.

Key Formulas & Mnemonics

Physical: Raoult’s Law, Nernst Equation (ΔG = –nFE), first-order half-life.

Inorganic: Magnetic moment μ = n(n+2) BM.

Mnemonics: Reactivity – "Please Stop Calling Me A Careless Zebra..." (K-Na-Ca-Mg-Al-Zn-Fe-Pb-H-Cu-Hg-Ag-Au); Ligands – "I SCaN You Bravely Carry Mighty Flag" (I⁻ to CO).

Last-Hour Revisions

Derivations: Nernst, first-order half-life, boiling point elevation.

Reactions: Etard, Cannizzaro, Hoffmann bromamide, Kolbe’s, Reimer-Tiemann.

Tests: Tollen’s, Fehling’s, Carbylamine, Hinsberg.

Graphs: First-order kinetics, conductivity vs dilution.

NCERT: In-text, exercises, examples—Inorganic is direct lift.

Exam Day Plan

Start with your strongest section (Organic/Physical); tackle numericals fresh; reserve 15 minutes for checks (units, structures, equations). Use reading time for internal choices; partial steps earn marks in conversions/numericals.

Repeated Topics

Physical: Nernst numericals, cell potential-ΔG, colligative properties. Organic: Conversions, distinctions, mechanisms (SN1/SN2). Inorganic: Crystal Field Theory, isomerism, IUPAC naming.