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Haloalkanes and Haloarenes

ICSE · Class 12 · Chemistry

All formulas from Haloalkanes and Haloarenes in ICSE Class 12 Chemistry. Key equations, constants, and identities for board exam preparation.

104 questions38 flashcards5 concepts

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A labeled diagram of a Daniell cell, showing the anode (zinc electrode), cathode (copper electrode), electrolyte solutions (zinc sulfate, copper sulfate), salt bridge, and the direction of electron an
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15 Formulas · 4 Sections

Formulas

1. Basic Classification and Naming

General formula of haloalkanes: C_nH_(2n+1)X

Rate law of SN1: Rate ∝ [Substrate]

Rate law of SN2: Rate = k [substrate] [nucleophile]

2. Reactivity Trends and Bond Facts

C-X bond strength order: C-F > C-Cl > C-Br > C-I

Order of C-X bond dissociation energy: C-F > C-Cl > C-Br > C-I

Reactivity of haloalkanes: R-I > R-Br > R-Cl > R-F

Reactivity of halogens towards alkanes: F2 > Cl2 > Br2 > I2

Ease of H-substitution in alkanes: benzylic > allylic > 3° > 2° > 1° > vinylic > aryl

4. Nucleophilic Substitution and Elimination

Alcohol to haloalkane: R-OH + HX --(Dehydrating agent)--> R-X + H2O

Chlorination of methane: CH4 + Cl2 (sunlight/heat) -> CH3Cl + CH2Cl2 + CHCl3 + CCl4

Finkelstein reaction: R-Cl/R-Br + NaI (acetone or methanol) -> R-I + NaCl/NaBr

Swarts reaction: 3CCl4 + 2SbF3 --SbCl5--> 3CCl2F2 + 2SbCl3

Hunsdiecker reaction: RCOOAg + Br2 -> RBr + CO2 + AgBr

4. Nucleophilic Substitution and Elimination

SN1 rate law: Rate ∝ [Substrate]

SN2 rate law: Rate = k [substrate] [nucleophile]

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Frequently Asked Questions

What are the important topics in Haloalkanes and Haloarenes for ICSE Class 12 Chemistry?
Key topics in Haloalkanes and Haloarenes include Haloalkanes and Haloarenes - Comprehensive Overview, Mind map showing the classification of halogen derivatives into aliphatic and aromatic compounds with further subcategories., Flowchart showing the step-by-step process for naming haloalkanes using IUPAC nomenclature rules.. These are the concepts ICSE Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in Haloalkanes and Haloarenes — ICSE Class 12 Chemistry?
Understand the core concepts first, then work through the 104 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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