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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.

    In nomenclature, which halogen is listed first alphabetically in 1-bromo-2-chloroethane?

    A.

    Chlorine

    B.

    Bromine

    C.

    Either can be first

    D.

    Depends on position

  2. 2.

    What is the correct IUPAC name for CH3−CH(Cl)−CH(CH3)−CH3CH_3-CH(Cl)-CH(CH_3)-CH_3?

    A.

    2-chloro-3-methylbutane

    B.

    3-chloro-2-methylbutane

    C.

    2-methyl-3-chlorobutane

    D.

    Isopentyl chloride

  3. 3.

    The common name for 1-bromobutane is:

    A.

    n-butyl bromide

    B.

    Isobutyl bromide

    C.

    sec-butyl bromide

    D.

    tert-butyl bromide

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.

    In R−XR-X, if RR is an alkyl group, the C−XC-X bond is typically formed by which carbon orbital?

    A.

    pp-orbital

    B.

    ss-orbital

    C.

    sp3sp^{3} hybrid orbital

    D.

    sp2sp^{2} hybrid orbital

  2. 2.

    The dipole moment of methyl halides depends on:

    A.

    Only the nature of alkyl group

    B.

    Only the nature of halogen group

    C.

    Both the nature of alkyl and halogen groups

    D.

    Atmospheric pressure

  3. 3.

    Which of the following halogens has the smallest covalent radius?

    A.

    II

    B.

    BrBr

    C.

    ClCl

    D.

    FF

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.

    In the reaction of but-1-ene with HBrHBr in the presence of benzoyl peroxide, the BrBr atom attaches to:

    A.

    Carbon-1

    B.

    Carbon-2

    C.

    Carbon-3

    D.

    Carbon-4

  2. 2.

    What happens when ethanol is treated with a mixture of NaBrNaBr and concentrated H2SO4H_2SO_4?

    A.

    Ethyl chloride is formed

    B.

    Ethyl bromide is formed

    C.

    Ethane is formed

    D.

    Ethene is the only product

  3. 3.

    In the preparation of aryl halides, why are the ortho and para isomers of halotoluenes easily separable?

    A.

    Due to their different chemical reactivities

    B.

    Due to large difference in their melting points

    C.

    Due to their different colors

    D.

    Due to their different smells

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.

    What is the common name of triiodomethane?

    A.

    Chloroform

    B.

    Bromoform

    C.

    Iodoform

    D.

    Freon

  2. 2.

    The rate of SN1S_N1 reaction is determined by the concentration of:

    A.

    Alkyl halide only

    B.

    Nucleophile only

    C.

    Both alkyl halide and nucleophile

    D.

    Solvent only

  3. 3.

    What is the name of the reaction where two molecules of aryl halides react with sodium in dry ether to form diphenyl?

    A.

    Wurtz reaction

    B.

    Fittig reaction

    C.

    Sandmeyer reaction

    D.

    Gattermann reaction

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.

    Which of the following has the strongest C−XC-X bond, making it the least reactive in nucleophilic substitution?

    A.

    CH3FCH_3F

    B.

    CH3ClCH_3Cl

    C.

    CH3BrCH_3Br

    D.

    CH3ICH_3I

  2. 2.

    Which of the following will favor an SN2S_N2 reaction over an SN1S_N1 reaction?

    A.

    A stable carbocation

    B.

    A primary alkyl halide

    C.

    A tertiary alkyl halide

    D.

    A polar protic solvent

  3. 3.

    Which bond is being formed and which is being broken in the SN2S_N2 transition state of R−X+Nu−R-X + Nu^-?

    A.

    C−NuC-Nu forms, C−XC-X breaks

    B.

    C−XC-X forms, C−NuC-Nu breaks

    C.

    C−HC-H forms, C−XC-X breaks

    D.

    C−XC-X breaks, X−NuX-Nu forms

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.

    Which of the following is NOT a polyhalogen compound?

    A.

    Dichloromethane

    B.

    Chloroform

    C.

    Chloromethane

    D.

    Iodoform

  2. 2.

    What is the Cl−C−ClCl-C-Cl bond angle in Carbon tetrachloride (CCl4CCl_{4})?

    A.

    90∘90^{\circ}

    B.

    120∘120^{\circ}

    C.

    109.5∘109.5^{\circ}

    D.

    180∘180^{\circ}

  3. 3.

    Which gas is released when DDT is used indiscriminately in the environment?

    A.

    Oxygen

    B.

    None, it is a non-volatile solid

    C.

    Helium

    D.

    Hydrogen

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