13 public questions tagged with this topic.
Formaldehyde is the most reactive due to the absence of alkyl groups, which reduces steric hindrance and increases the electrophilicity of the carbonyl carbon.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Relevant Chemistry topic covering principles and examples as per NCERT.
Alkynes are more reactive than alkenes and alkanes due to the presence of a triple bond. 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.
Tertiary halides react the slowest in S_N₂ reactions due to steric hindrance. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.
Reactivity with HCN decreases with steric hindrance and increases with electrophilicity: CH₃COCH₃ (ketone) < C₆H₅CHO (aromatic aldehyde) < CH₃CHO (aliphatic aldehyde).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Nomenclature, Structure and Preparation of Aldehydes and Ketones
Phenol is more acidic than alcohols due to resonance stabilization of the phenoxide ion, so it reacts more vigorously with sodium metal.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Preparation of Alcohols - from Alkenes Haloalkanes Carbonyls Grignard
Elimination (E₂) with alcoholic KOH favors tertiary halides due to stable alkene formation. (CH₃)3CBr reacts fastest.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Polyhalogen Compounds - Chloroform Iodoform DDT Freons
SN₂ favors primary halides due to less steric hindrance. CH₃CH₂CH₂CH₂I (iodide) is most reactive due to the best leaving group.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility
SN₂ favors primary halides due to less steric hindrance. CH₃CH₂CH₂Cl (1-chloropropane) is most reactive among the options.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility
SN₁ reactivity increases with carbocation stability. (CH₃)2CHCH₂C(CH₃)2Cl forms a tertiary carbocation, making it most reactive.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nucleophilic Substitution Reactions - SN1 and SN2 Mechanisms
SN₂ substitution with NaOH favors primary halides. CH₃CH₂I (iodide) reacts fastest due to the best leaving group.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
Reactivity with water increases down group 1 due to decreasing ionization enthalpy. Cs (lowest ionization enthalpy) reacts most vigorously among Li, Na, K, and Cs.
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Periodic Trends - Atomic Radii Ionic Radii and Ionization Enthalpy
