Class 12 Chemistry Organic Reactions List – CBSE Important Reactions to Pass Easily
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Class 12 Chemistry Organic Reactions List (CBSE) – Easy Guide to Pass & Score High
Organic Chemistry is one of the most scoring parts of CBSE Class 12 Chemistry if you remember the right reactions. Every year, CBSE asks questions from haloalkanes, alcohols, aldehydes, amines, and biomolecules.
This article provides a chapter-wise organic reactions list for Class 12 Chemistry that helps you revise quickly and pass the exam easily.
Why Organic Reactions Are Important?
| Reason |
|---|
| Direct questions from reactions |
| Used in conversions |
| Asked in mechanisms |
| Helps in MCQs |
| Important for competitive exams |
Chapter-Wise Organic Reactions List (CBSE Class 12)
1. Haloalkanes & Haloarenes
Important Reactions
| Reaction | Reagents | Product |
|---|---|---|
| Nucleophilic substitution (SN1, SN2) | aq. KOH | Alcohol |
| With alcoholic KOH | alc. KOH | Alkene |
| Wurtz reaction | Na + dry ether | Alkane |
| Finkelstein reaction | NaI + acetone | Alkyl iodide |
| Swarts reaction | AgF | Alkyl fluoride |
2. Alcohols, Phenols & Ethers
Alcohols
| Reaction | Reagent |
|---|---|
| Oxidation | PCC / KMnO₄ |
| Dehydration | conc. H₂SO₄ |
| With Na metal | Sodium alkoxide |
Phenols
| Reaction | Reagent |
|---|---|
| Kolbe reaction | CO₂ + NaOH |
| Reimer-Tiemann | CHCl₃ + KOH |
| Bromination | Br₂ water |
Ethers
| Reaction |
|---|
| Williamson synthesis |
| Acidic cleavage |
3. Aldehydes & Ketones
Important Name Reactions
| Name Reaction | Use |
|---|---|
| Tollens test | Aldehyde detection |
| Fehling test | Aldehyde detection |
| Aldol condensation | Carbon chain increase |
| Cannizzaro reaction | No alpha-H aldehydes |
| Clemmensen reduction | Carbonyl → Alkane |
| Wolff-Kishner | Carbonyl → Alkane |
4. Carboxylic Acids
| Reaction | Reagent |
|---|---|
| Esterification | Alcohol + H₂SO₄ |
| Decarboxylation | Soda lime |
| Reduction | LiAlH₄ |
5. Amines
Important Reactions
| Reaction | Reagent |
|---|---|
| Carbylamine test | CHCl₃ + alc. KOH |
| Diazotization | NaNO₂ + HCl |
| Hoffmann bromamide | Br₂ + NaOH |
| Alkylation | RX |
| Acylation | Acetyl chloride |
6. Biomolecules (Basic)
| Reaction |
|---|
| Hydrolysis of sucrose |
| Protein denaturation |
| Glucose oxidation |
Most Important Name Reactions (Must Memorize)
| Reaction Name |
|---|
| Wurtz |
| Finkelstein |
| Swarts |
| Reimer-Tiemann |
| Kolbe |
| Aldol |
| Cannizzaro |
| Tollens |
| Fehling |
| Hoffmann bromamide |
| Carbylamine |
Conversion-Based Reactions (Very Important)
Examples:
-
Alcohol → Aldehyde → Acid
-
Alkyl halide → Alcohol → Ether
-
Benzene → Phenol → Aniline
-
Aldehyde → Alcohol → Acid
One-Day Organic Chemistry Revision Plan
| Time | Topic |
|---|---|
| 1 hr | Haloalkanes |
| 1 hr | Alcohols & Phenols |
| 1 hr | Aldehydes & Ketones |
| 45 min | Amines |
| 30 min | Carboxylic acids |
| 45 min | Name reactions |
| 30 min | Practice conversions |
Tips to Remember Organic Reactions Easily
- Make reaction charts
- Use flashcards
- Revise daily
- Practice conversions
- Learn reagents
- Write mechanisms
- Solve NCERT back questions
Click Here to Know More about CBSE Class 12 Chemistry Last Minute Revision 2026 – Easy Overview to Pass Board Exam Details: https://dekhocampus.com/news/cbse-class-12-chemistry-last-minute-revision-2026
FAQs (Frequently Asked Questions)
Around 40–50 important reactions.
Yes, selected ones.
Yes, very important.
Yes, every year.
Yes, organic helps score high.
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