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Haloalkanes and Haloarenes — Important Questions

ICSE · Class 12 · Chemistry

104 important questions from Haloalkanes and Haloarenes for ICSE Class 12 Chemistry, with answers. Includes multiple choice questions.

104 questions38 flashcards13 formulas & key relations5 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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104 Questions·
multiple choice

Important Questions from Haloalkanes and Haloarenes

1multiple choice

Which of the following is the correct IUPAC name for (CH3)2CHCH2Cl?

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1-chloro-2-methylpropane

Parent chain: propane (3C). Cl on C1, methyl group on C2. IUPAC: 1-chloro-2-methylpropane. List substituents alphabetically: chloro before methyl. Common name: iso-butyl chloride (not IUPAC).

2multiple choice

Which reagent is preferred for preparing alkyl chlorides from alcohols and WHY?

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SOCl2 — byproducts are gases that escape

R-OH + SOCl2 → R-Cl + SO2↑ + HCl↑. Both byproducts (SO2 and HCl) are gases and escape from reaction mixture, leaving pure R-Cl. With PCl5, POCl3 remains as liquid byproduct requiring separation.

3multiple choice

The Finkelstein reaction involves:

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Conversion of RCl/RBr to RI using NaI in acetone

Finkelstein reaction: R-Cl + NaI → R-I + NaCl (in dry acetone). NaCl precipitates in acetone (insoluble) → equilibrium shifts to products. Used to prepare iodoalkanes which are hard to make directly.

4multiple choice

The boiling points of haloalkanes with the same alkyl group follow the order:

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RF < RCl < RBr < RI

BP increases with atomic mass of halogen (RF < RCl < RBr < RI) because larger halogens have stronger van der Waals forces. Example: CH3F (194.6K) < CH3Cl (248.8K) < CH3Br (276.6K) < CH3I (315.4K).

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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 Classification and Nomenclature, Preparation of Haloalkanes, Physical Properties and Nature of C-X Bond, Chemical Properties of Haloalkanes. Study these first, then practise questions on each for the ICSE Class 12 board exam.
How many important questions are there in Haloalkanes and Haloarenes?
Super Tutor has 104 practice questions for Haloalkanes and Haloarenes, including multiple choice questions. A sample with answers is on this page.

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

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