If you are preparing for the CBSE class 12 chemistry paper 2026, you must know about important named reactions. Every year, questions from organic chemistry are asked in the exam directly or indirectly. You may get questions where you have to finish a reaction, do a conversion, show the steps or explain why something happens.<\/p>\n
At Aakash, we have trained lakhs of students for board exams and competitive exams. One pattern is clear. Students who know and have practised the important reactions score faster and with more confidence.<\/p>\n
Let\u2019s see the most important reactions and you will get to know the practical exam tips that actually work.<\/p>\n
Tap To Watch: Visual Story<\/strong><\/p>\n In the CBSE class 12 chemistry, organic chemistry has a strong weightage. Many questions are directly asked from the <\/span>chemistry class 12 chapters<\/b>, like:<\/span><\/p>\n When you understand the <\/span>organic chemistry reactions<\/b><\/a>, you do not just memorise. You recognise patterns. <\/span>CBSE board exam 2026<\/span> now focuses more on application-based reactions and not just definitions. So, having clarity is more important for you than speed.<\/span><\/p>\n Here are some of the <\/span>all name reactions in organic chemistry class 12<\/b> that are repeatedly asked:\u00a0<\/span><\/p>\n Wurtz reaction<\/a> is a coupling reaction in organic chemistry named after Charles Adolphe Wurtz. The Wurtz reaction leads to the preparation of higher alkanes. It is also beneficial in preparing alkanes with an even number of carbon atoms.<\/p>\n Two alkyl halides react with sodium metal in dry ether to form a higher alkane<\/span><\/p>\n Equation<\/b>:<\/span><\/p>\n 2R\u2013X + 2Na \u2192 (dry ether) R\u2013R + 2NaX\u00a0<\/span><\/p>\n Why it matters:<\/span><\/p>\n Aryl halides react with sodium in dry ether, and the two aryl parts join together<\/span><\/p>\n Equation<\/b>:<\/span><\/p>\n 2 Ar\u2013X + 2Na \u2192 (dry ether) Ar\u2013Ar + 2NaX<\/span><\/p>\n The Friedel-Crafts reaction<\/a> is used to produce the important dying agent triarylmethane. So, in this article, you will get a deep knowledge of the Friedel-Crafts reaction.<\/p>\n Benzene reacts with alkyl halide or acyl chloride in the presence of AlCl\u2083<\/span><\/p>\n General Equation<\/b>:<\/span><\/p>\n Ar\u2013H + R\u2013X \u2192 (AlCl\u2083) Ar\u2013H + HX<\/span><\/p>\n General Equation<\/b>:<\/span><\/p>\n Ar\u2013H + RCOCl \u2192 (AlCl\u2083) Ar\u2013COR + HCl<\/span><\/p>\n Very important from the Alcohols, Phenols and Ethers chapter.<\/span><\/p>\n CBSE may ask:<\/span><\/p>\n Aryl diazonium salt reacts with CuCl or CuBr to form aryl chloride or bromide.<\/span><\/p>\n General Equation<\/b>:<\/span><\/p>\n Ar\u2013N\u2082\u207aX\u207b + CuX \u2192 Ar\u2013X + N\u2082\u2191<\/span><\/p>\n Important from the Amines chapter. Many board papers directly ask this reaction.<\/span><\/p>\n Similar to Sandmeyer, but uses HCl or HBr with copper powder<\/span><\/p>\n Ar\u2013N\u2082\u207aX\u207b + HCl\/HBr + Cu \u2192 ArX + N\u2082\u2191<\/span><\/p>\n Students often mix these two. You need to revise the difference clearly.<\/span><\/p>\n Alkyl chloride or bromide converts into alkyl fluoride using metal fluorides<\/span><\/p>\n Equation<\/b>:<\/span><\/p>\n R\u2013X + AgF \u2192 R\u2013F + AgX<\/span><\/p>\n Or commonly,\u00a0<\/span><\/p>\n R\u2013X + SbF<\/span>3<\/span>\u200b\u2192\u200bR\u2013F<\/span><\/p>\n H\u2083C\u2013X + AgF \u2192 H\u2083 R\u2013F + AgX<\/span><\/p>\n The process of aldol condensation<\/a> involves a nucleophile attack on a carbonyl to produce a ketone or aldehyde of \u03b2-hydroxy. The catalyzation of the condensation process can be carried out with the help of an acidic or basic solution.<\/p>\n Aldehydes or ketones with an alpha hydrogen react in the presence of a dilute base to form a beta-hydroxy aldehyde or ketone, which on heating gives an \u03b1,\u03b2-unsaturated compound.<\/span><\/p>\n General Equation<\/b>:<\/span><\/p>\n 2CH\u2083CHO + dil.NaOH\u2192 CH\u2083CH(OH)CH<\/span>2<\/span>CHO<\/span><\/p>\n On heating,<\/span><\/p>\n CH\u2083CH(OH)CH<\/span>2<\/span>CHO\u2192CH\u2083CH = CHCHO + H\u2082O<\/span><\/p>\n Very important from Aldehydes and Ketones.<\/span><\/p>\n Application-based questions are common in the <\/span>CBSE class 12 chemistry paper 2026<\/b>.<\/span><\/p>\n Aldehydes or ketones reduce to hydrocarbons using hydrazine and base<\/span><\/p>\n General Equation<\/b>:<\/span><\/p>\n R\u2082C = O + NH\u2082NH\u2082 + KOH+heat \u2192 R\u2082CH\u2082 + N\u2082\u2191 + H\u2082O<\/span><\/p>\n Students often ask how to remember <\/span>all name reactions in organic chemistry class 12<\/b><\/a> without confusion. Here is what you can do:\u00a0<\/span><\/p>\n\n
Why Named Reactions Matter for CBSE Class 12 Chemistry Paper 2026<\/strong><\/h2>\n
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Important Named Reactions in Organic Chemistry<\/strong><\/h2>\n
1. Wurtz Reaction:\u00a0<\/strong><\/h3>\n
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2. Fittig Reaction<\/strong><\/h3>\n
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3. Friedel-Crafts Alkylation and Acylation:<\/strong><\/h3>\n
Alkylation:<\/b><\/h4>\n
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Acylation:\u00a0<\/b><\/h4>\n
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4. Sandmeyer Reaction<\/strong><\/h3>\n
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5. Gattermann Reaction<\/strong><\/h3>\n
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6. Swarts Reaction<\/strong><\/h3>\n
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7. Aldol Condensation<\/strong><\/h3>\n
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8. Wolff – Kishner Reduction<\/strong><\/h3>\n
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How Can You Remember All Name Reactions Easily<\/strong><\/h2>\n
Group by Chapter, Not Alphabetically<\/strong><\/h3>\n
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