7 public questions tagged with this topic.
In the Hell-Volhard-Zelinsky reaction, carboxylic acids with α-hydrogens react with bromine in the presence of red phosphorus to form α-bromo carboxylic acids.
Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.
Soda lime (NaOH + CaO) is commonly used to remove the carboxyl group from carboxylic acids, forming hydrocarbons. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.
The compound has a 5-carbon chain with a carboxylic acid group (pentanoic acid) and a double bond between C-3 and C-4: pent-3-enoic acid.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Chemical Reactions - Reduction, Oxidation and Tests - Tollens, Fehling, Iodoform
The compound has a 4-carbon chain with a carboxylic acid group (butanoic acid) and a double bond between C-2 and C-3: but-2-enoic acid.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Chemical Reactions - Reduction, Oxidation and Tests - Tollens, Fehling, Iodoform
Acidity increases with electron-withdrawing groups: CH₃CH₂CH₂COOH (alkyl) < CH₃COOH < CH₃CHClCOOH (Cl closer to COOH).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Chemical Reactions - Reduction, Oxidation and Tests - Tollens, Fehling, Iodoform
Acidity increases with electron-withdrawing groups: CH₂ClCOOH (Cl) > CH₃COOH > CH₃CH₂CH₂COOH (alkyl reduces acidity).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Chemical Reactions - Reduction, Oxidation and Tests - Tollens, Fehling, Iodoform
Acidity increases with electron-withdrawing groups: CH₃CH₂COOH (alkyl) < CH₃COOH < CH₂FCOOH (F enhances acidity).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Chemical Reactions - Reduction, Oxidation and Tests - Tollens, Fehling, Iodoform
