Facebook Twitter Instagram
    ScienceMotive
    • Class 9
      • Matter in Our Surroundings
      • Is Matter Around Us Pure
      • Atoms and Molecules
      • Structure of the Atom
      • The Fundamental Unit of Life
    • Class 10
      • Chemistry
    • Class 11
      • Chemisrty
        • Chapter – 1 Some Basic Concepts of Chemistry
        • Chapter – 2 Structure Of Atom
        • Chapter – 3 Classification of Elements and Periodicity in Properties
        • Chapter – 4 Chemical Bonding and Molecular Structure
        • Chapter – 5 States of Matter
        • Chapter – 6 Thermodynamics
        • Chapter – 7 Equilibrium
        • Chapter – 8 Redox Reaction
        • Chapter – 10 s-Block Elements
        • Chapter – 13 Hydrocarbons
    • Class 12
      • Chemistry
        • The Solid State
        • Solutions
        • Electrochemistry
        • Chemical Kinetics
        • Surface Chemistry
        • p – Block Elements
        • d & f Block Elements
        • Coordination Compounds
        • Haloalkanes and Haloarenes
        • Alcohols, Phenols and Ethers
        • Aldehydes, Ketones and Carboxylic Acids
        • Amines
        • Biomolecules
        • Polymers
        • Chemistry in Everyday Life
    • Practice Questions
      • +1
      • +2
    • Test Series
      • Class 9 Test Series
      • Class 10 Test Series
      • Class 11 Test Series
      • Class 12 Test Series
    • World
      • Current Affairs
      • General Knowledge
    ScienceMotive
    Home » Haloalkanes and Haloarenes Class 12 – Questions & Answers

    Haloalkanes and Haloarenes Class 12 – Questions & Answers

    Dr. Vikas JasrotiaBy Dr. Vikas JasrotiaAugust 2, 2022No Comments
    Share
    Facebook WhatsApp Telegram Twitter Email

     

    Haloalkanes and Haloalkanes Class 12 – Questions & Answers 

    Haloalkanes and Haloarenes Class 12

    Que 1. Give reasons for the following:                                                                
    (i) The bond length of the C–Cl bond is larger in haloalkanes than that in haloarenes.
    (ii) Although alkyl halides are polar in nature but are not soluble in water.
    (iii) Haloalkanes react with KCN to form alkyl cyanide as the main product while with AgCN alkyl isocyanide is the main product.
    (iv) Sulphuric acid is not used in the reaction of alcohol with Kl.
    (v) Thionyl chloride is the preferred reagent for converting ethanol to chloroethane.
    (vi) Haloalkanes undergo nucleophilic substitution reaction easily but haloarenes do not undergo nucleophilic substitution under ordinary conditions.
    (vii) 2, 4-Dinitro chlorobenzene is much more reactive than chlorobenzene towards hydrolysis reaction with NaOH.
    (viii) Grignard reagent should be prepared under anhydrous conditions.

    Que 2. Assertion Reason Type Questions:
    (A) Both Assertion and reason are true and the reason is the correct explanation of assertion.
    (B) Assertion and reason both are true but the reason is not the correct explanation of assertion.
    (C) Assertion is true, the reason is false.
    (D) Assertion is false, reason is true.
    (i) ASSERTION – Treating alcohols with thionyl chloride is the most preferred method to prepare haloalkanes.
    REASON – In this method, the by-products are escapable gases.
    (ii) ASSERTION – When Hydrogen Bromide is added to propene, 2-bromopropane is the major product.
    REASON – Br– is added to that double-bonded carbon, which has more hydrogen atoms bonded to it.
    (iii) ASSERTION – KCN reacts with methyl chloride to give methyl isocyanide.
    REASON – CN– is an ambident nucleophile.

    Que 3. The best method for conversion of alcohol into an alkyl chloride is by treating alcohol with
    (a) PCl5                                                                                 (b) Dry HCl + anhy. ZnCl2
    (c) SOCl2 in presence of pyridine                                        (d) PCl3

    Que 4. Which among MeX, RCH2X, R2CHX, and R3CX is most reactive towards SN2 reaction?
    (a) MeX                                                                                (b) R3CX
    (c) R2CHX                                                                            (d) RCH2X

    Que 5. Racemic mixture has
    (a) Equimolar mixture of enantiomers         (b) 1:1 mixture of enantiomers and diastereomers
    (c) 1:1 mixture of diastereomers                  (d) 1:2 mixture of enantiomer and diastereomers

    Que 6. Write: (i) Finkelstein reaction
    (ii) Swarts reaction
    (iii) Sandmeyer reaction

    Que 7. True/False
    (i) 2-Chloro Butane is not an optically active substance                                                       True/False
    (ii) Grignard reagent can be formed in the absence of dry ether.                                     True/False
    (iii) Vinyl Chloride does have not sp² hybridization.                                                               True/False
    (iv) Good yields of R—I may be obtained by heating R-OH with sodium or potassium iodide in 95% phosphoric acid.      True/False
    (v) In the abbreviation SN2, 2 indicates the number of steps of the reaction.                  True/False

     

    Haloalkanes and Haloarenes Class 12

    Advertisement
    Chapter 10 Chapter 10 Chemistry Haloalkanes and Haloarenes Class 12 Important Questions
    Share. Facebook Twitter Pinterest LinkedIn Tumblr Email
    Dr. Vikas Jasrotia
    • Website

    Related Posts

    CBSE Sample Paper Session 2022-23 (Chemistry) PDF

    September 16, 2022

    CBSE Important Questions Electrochemistry

    March 16, 2022

    Board Important Questions Coordination Compound

    March 14, 2022

    Leave A Reply Cancel Reply

    READ ALSO

    Periodic Classification of Elements Questions PDF (Answers)

    March 1, 2023

    Periodic Classification of Elements Questions

    February 28, 2023

    Carbon and Its Compounds Class 10 Solutions of Practice Questions

    February 22, 2023

    Carbon and Its Compounds Class 10 Practice Questions

    February 21, 2023
    Class 10 Test Series

    Periodic Classification of Elements Questions PDF (Answers)

    By Dr. Vikas JasrotiaMarch 1, 2023

    Periodic Classification of Elements Questions PDF (Answers) Periodic Classification of Elements Questions PDF Ans 1.…

    Class 10 Test Series

    Periodic Classification of Elements Questions

    By Dr. Vikas JasrotiaFebruary 28, 2023

    Periodic Classification of Elements Questions Periodic Classification of Elements Questions Que 1. What is the…

    Class 10 Test Series

    Carbon and Its Compounds Class 10 Solutions of Practice Questions

    By Dr. Vikas JasrotiaFebruary 22, 2023

    Carbon and Its Compounds Class 10 Solutions of Practice Questions Carbon and Its Compounds Class…

    Advertisement
    Advertisement
    Facebook Twitter Instagram Pinterest YouTube
    • Disclaimer
    • Contact Us
    • Privacy Policy 
    • Terms and Conditions
    © 2023 All Rights Reserved ScienceMotive.

    Type above and press Enter to search. Press Esc to cancel.