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Haloalkanes and Haloarenes

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Classification and Nomenclature

Subtopic

Classification and Nomenclature under Haloalkanes and Haloarenes for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following is an example of a benzylic halide?

    A.

    Chlorobenzene

    B.

    1-Chloroethylbenzene

    C.

    o-Chlorotoluene

    D.

    Vinyl chloride

  2. 2.

    What is the IUPAC name of the compound with the formula (CH3)3CCH2Br(CH_3)_3CCH_2Br?

    A.

    1-Bromo-2,2-dimethylpropane

    B.

    2-Bromo-2-methylbutane

    C.

    Neopentyl bromide

    D.

    1-Bromo-3-methylbutane

  3. 3.

    In an allylic halide, the halogen atom is bonded to which type of carbon atom?

    A.

    An sp2sp^2 hybridized carbon atom of a vinyl group

    B.

    An sp3sp^3 hybridized carbon atom next to a carbon-carbon double bond

    C.

    An sp2sp^2 hybridized carbon atom of an aromatic ring

    D.

    An spsp hybridized carbon atom of an alkyne

Download the worksheet for Haloalkanes and Haloarenes - Classification and Nomenclature to practice offline. It includes additional chapter-level practice questions.

Nature of C-X Bond

Subtopic

Nature of C-X Bond under Haloalkanes and Haloarenes for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    As we move from Fluorine to Iodine in the halogen group, the C−XC-X bond length in haloalkanes:

    A.

    Increases

    B.

    Decreases

    C.

    Remains constant

    D.

    First increases then decreases

  2. 2.

    Which of the following C−XC-X bonds is the most polar?

    A.

    C−IC-I

    B.

    C−BrC-Br

    C.

    C−ClC-Cl

    D.

    C−FC-F

  3. 3.

    Which of the following describes the hybridization of the carbon atom in the C−XC-X bond of an alkyl halide?

    A.

    spsp

    B.

    sp2sp^2

    C.

    sp3sp^3

    D.

    sp3dsp^3d

Download the worksheet for Haloalkanes and Haloarenes - Nature of C-X Bond to practice offline. It includes additional chapter-level practice questions.

Methods of Preparation

Subtopic

Methods of Preparation under Haloalkanes and Haloarenes for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which reagent is typically employed in the Swarts reaction to synthesize alkyl fluorides?

    A.

    NaINaI / Acetone

    B.

    AgFAgF or Hg2F2Hg_2F_2

    C.

    Cl2Cl_2 / UVUV light

    D.

    SOCl2SOCl_2 / Pyridine

  2. 2.

    The Finkelstein reaction is specifically used for the preparation of which of the following compounds?

    A.

    Alkyl fluorides

    B.

    Alkyl chlorides

    C.

    Alkyl bromides

    D.

    Alkyl iodides

  3. 3.

    Identify the major product formed when propene reacts with hydrogen bromide in the presence of benzoyl peroxide.

    A.

    1-Bromopropane

    B.

    2-Bromopropane

    C.

    1,2-Dibromopropane

    D.

    2,2-Dibromopropane

Download the worksheet for Haloalkanes and Haloarenes - Methods of Preparation to practice offline. It includes additional chapter-level practice questions.

Physical and Chemical Properties

Subtopic

Physical and Chemical Properties under Haloalkanes and Haloarenes for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following represents the correct order of reactivity of alkyl halides towards SN2S_N2 reactions?

    A.

    1∘>2∘>3∘1^\circ > 2^\circ > 3^\circ

    B.

    3∘>2∘>1∘3^\circ > 2^\circ > 1^\circ

    C.

    2∘>1∘>3∘2^\circ > 1^\circ > 3^\circ

    D.

    1∘>3∘>2∘1^\circ > 3^\circ > 2^\circ

  2. 2.

    The reaction of an alkyl halide with sodium metal in dry ether to form a hydrocarbon with double the number of carbon atoms is known as:

    A.

    Fittig reaction

    B.

    Friedel-Crafts reaction

    C.

    Wurtz reaction

    D.

    Swarts reaction

  3. 3.

    Haloalkanes are only very slightly soluble in water because:

    A.

    They are non-polar molecules

    B.

    They cannot form hydrogen bonds with water molecules

    C.

    They react with water to form alcohols

    D.

    Their density is higher than that of water

Download the worksheet for Haloalkanes and Haloarenes - Physical and Chemical Properties to practice offline. It includes additional chapter-level practice questions.

Mechanism of Nucleophilic Substitution (SN1 and SN2)

Subtopic

Mechanism of Nucleophilic Substitution (SN1 and SN2) under Haloalkanes and Haloarenes for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The rate of an SN1S_N1 reaction is primarily dependent on the concentration of:

    A.

    The nucleophile only

    B.

    The alkyl halide only

    C.

    Both the alkyl halide and the nucleophile

    D.

    The solvent only

  2. 2.

    What is the primary stereochemical outcome of a reaction proceeding via the SN2S_N2 mechanism on a chiral center?

    A.

    Retention of configuration

    B.

    Complete racemization

    C.

    Partial racemization

    D.

    Inversion of configuration

  3. 3.

    The SN1S_N1 mechanism of nucleophilic substitution involves the formation of which intermediate species?

    A.

    Carbanion

    B.

    Free radical

    C.

    Carbocation

    D.

    Transition state with pentavalent carbon

Download the worksheet for Haloalkanes and Haloarenes - Mechanism of Nucleophilic Substitution (SN1 and SN2) to practice offline. It includes additional chapter-level practice questions.

Polyhalogen Compounds

Subtopic

Polyhalogen Compounds under Haloalkanes and Haloarenes for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Carbon tetrachloride (CCl4CCl_{4}) is used as a fire extinguisher under which commercial name?

    A.

    Phosgene

    B.

    Freon-12

    C.

    Pyrene

    D.

    Chloral

  2. 2.

    Which of the following compounds is primarily responsible for the depletion of the ozone layer in the upper atmosphere?

    A.

    DDT

    B.

    Chloroform

    C.

    Freons

    D.

    Iodoform

  3. 3.

    The antiseptic properties of iodoform (CHI3CHI_{3}) are due to which of the following?

    A.

    The iodoform molecule itself

    B.

    The liberation of free iodine

    C.

    The presence of the methyl group

    D.

    Its high solubility in water

Download the worksheet for Haloalkanes and Haloarenes - Polyhalogen Compounds to practice offline. It includes additional chapter-level practice questions.

Haloalkanes and Haloarenes - Class 12 Chemistry (CBSE) | Krit.club