Summary of "Class 12 Chemistry: Must-DO Topics Before Preboards (Score 95+ Strategy)"

Summary of “Class 12 Chemistry: Must-DO Topics Before Preboards (Score 95+ Strategy)”

This video provides a strategic, focused approach to scoring full marks (70/70) in Class 12 Chemistry pre-board and board exams by concentrating on the most frequently asked and important topics chapter-wise. The presenter emphasizes that the exam is not as difficult as it is often portrayed, and that studying smartly by targeting key topics and questions can guarantee high scores without excessive hours of study.

Main Ideas and Concepts

Exam Difficulty Myth The pre-board exam is not inherently tough; the key is to focus on important topics that regularly appear in exams.
Study Smart, Not Hard It is unnecessary to study all chapters exhaustively. Instead, focus on selected important topics and questions that are repeatedly asked.
Examiner’s Question Selection Pattern Examiners create papers from the same syllabus and topics each year, varying only question wording and difficulty. Hence, certain topics consistently appear.
Importance of NCERT NCERT questions, including in-text examples and exercises, form the backbone of exam questions.
Board Booster Batch The presenter offers a paid batch starting 24th November, which covers all important topics with notes, tests, and doubt support.

Chapter-wise Important Topics and Instructions

1. Haloalkanes and Haloarenes

Focus on nucleophilic substitution reactions.
Important reagents: SOCl₂, KCN, AgCN, alcoholic and aqueous KOH.
Name reactions: Finkelstein and Sandmeyer reactions.
Study Markovnikov and anti-Markovnikov addition of HBr to alkenes.
Classification of halides: benzylic and allylic halides are crucial.
Key NCERT question: Why are aryl halides least reactive towards nucleophilic substitution?

2. Alcohols, Phenols, and Ethers

Hydration mechanisms and types.
Preparation via Grignard reagents (primary, secondary, tertiary).
Dehydration and oxidation mechanisms.
Acidic nature of alcohols and phenols; influence of electron withdrawing/donating groups.
Important name reactions: Reimer-Tiemann (salicylaldehyde synthesis), Kolbe reaction, halogenation of phenol, Williamson synthesis.
Key NCERT questions: Refer to specific text and exercise questions (7.3, 5, 8, 9, 10, etc.).

3. Aldehydes, Ketones, and Carboxylic Acids

Focus on reductive ozonolysis, alkyne hydration.
Name reactions: Rosenmund, Stephen, Gattermann, and Clemmensen reductions.
Definitions of acetal, hemiacetal, oxime, cyanohydrin.
Important tests: Iodoform test, Tollen’s test, Fehling’s test.
Study acidic nature of benzoic acid and effects of substituents.
NCERT questions: Focus on text 8.4, 8.2, 7, 8, and exercises.

4. Amines

Basicity order in gaseous and aqueous phases.
Important name reactions: Hoffmann, Bromide, Gabriel phthalimide synthesis, Schmidt reaction.
Tests to distinguish primary, secondary, tertiary amines: Carbylamine test, nitrous acid test, Hinsberg test.
Understand nitration of aniline and directing effects.
NCERT questions highlighted.

5. Biomolecules

Limited questions expected.
Important topics:
- Types of carbohydrates (reducing vs non-reducing)
- Fibrous vs globular proteins
- Essential vs non-essential amino acids
- DNA vs RNA
- Alpha helix vs beta pleated sheet

6. Physical Chemistry

Concentration terms, especially molarity.
Solubility and Henry’s law (numerical focus).
Difference between ideal and non-ideal solutions.
Raoult’s law and related numerical problems.
Colligative properties and their numericals.
Osmosis and difference between hypertonic and hypotonic solutions.
NCERT in-text examples and exercises are key.

7. Electrochemistry

Difference between galvanic and electrolytic cells.
Nernst equation applications.
Conductivity, molar conductance, and effect of dilution.
Kohlrausch’s law.
Lead storage and fuel cells.
Practice last 5–10 years of previous year questions (PYQs).

8. Chemical Kinetics

Rate laws, molecularity vs order.
Graphs and numerical problems on zero and first order reactions.
Half-life and rate constant calculations.
Arrhenius equation.
Focus on NCERT exercises and examples.

9. Inorganic Chemistry

Coordination compounds: nomenclature, isomerism, linkage, hydration, ionization.
Facial and meridional isomers.
Paramagnetic vs diamagnetic behavior, magnetic moment.
Hybridization via Valence Bond Theory (VBT) and Crystal Field Splitting (CFS).
Stability of coordination compounds.
d- and f-block elements: electronic configuration, atomic radii, lanthanide contraction.
Important compounds’ preparation and redox reactions.
Practice examples and exercises thoroughly.

Additional Recommendations

Solve at least the last 5 years of previous year questions for each chapter to secure full marks.
Focus on the specific topics and questions mentioned rather than the entire syllabus.
Join the Board Booster 2026 batch for structured learning, notes, tests, and doubt clearing.

Speakers / Sources

Primary Speaker: Akash (referred to as “Bhaiya” or “Brother” by students), the presenter and tutor providing the strategy and topic breakdown.

Overall, the video delivers a targeted revision strategy focusing on the most important and frequently asked topics in Class 12 Chemistry, backed by NCERT questions and previous year trends, aimed at helping students score full marks efficiently.