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Haloalkanes and Haloarenes

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

Nomenclature and nature of C-X bond

Subtopic

Nomenclature and nature of C-X bond under Haloalkanes and Haloarenes for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    What is the correct IUPAC name of the haloalkane represented in the provided diagram?

    A.

    1,2-dichlorobutane

    B.

    2,3-dichloropropane

    C.

    1,2-dichloropropane

    D.

    1,1-dichloropropane

  2. 2.

    In the IUPAC system, haloalkanes are named as derivatives of:

    A.

    Halogens

    B.

    Alkanes

    C.

    Alkenes

    D.

    Alkynes

  3. 3.

    What is the IUPAC name of the compound CH3BrCH_{3}Br?

    A.

    Methyl bromide

    B.

    Bromomethane

    C.

    Bromoethane

    D.

    Methane bromide

Download the worksheet for Haloalkanes and Haloarenes - Nomenclature and 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 ICSE.

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Preview questions (no answers)

  1. 1.

    Diazotization of aniline is carried out at which temperature range?

    A.

    100 - 110 KK

    B.

    273 - 278 KK

    C.

    373 - 378 KK

    D.

    500 - 600 KK

  2. 2.

    Which of the following reagents will convert ethanol into ethyl chloride most effectively in terms of purification?

    A.

    HClHCl gas

    B.

    PCl3PCl_{3}

    C.

    PCl5PCl_{5}

    D.

    SOCl2SOCl_{2}

  3. 3.

    The addition of Br2Br_{2} to trans-but-2-ene results in a product that is:

    A.

    A meso compound

    B.

    A racemic mixture

    C.

    Optically active

    D.

    A primary halide

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 ICSE.

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Preview questions (no answers)

  1. 1.

    When methyl chloride is treated with an excess of ammonia, the major product formed is:

    A.

    Methylamine

    B.

    Dimethylamine

    C.

    Trimethylamine

    D.

    Tetramethylammonium chloride

  2. 2.

    Which of the following reacts fastest with HBrHBr to form an alkyl bromide?

    A.

    Methanol

    B.

    Ethanol

    C.

    Propan-2-ol

    D.

    2-methylpropan-2-ol

  3. 3.

    The process of separating a racemic mixture into its pure enantiomers is known as:

    A.

    Racemization

    B.

    Resolution

    C.

    Inversion

    D.

    Retention

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

Mechanism of substitution reactions (SN1 and SN2)

Subtopic

Mechanism of substitution reactions (SN1 and SN2) under Haloalkanes and Haloarenes for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    In the following flowchart representing a nucleophilic substitution reaction, identify the chemical species that functions specifically as the 'substrate'.

    A.

    OHOH^-

    B.

    CH3ICH_3I

    C.

    CH3OHCH_3OH

    D.

    II^-

  2. 2.

    In a haloalkane (RXR-X), the carbon-halogen bond is polarized due to the difference in electronegativity. Based on the partial charges shown in the diagram, which atom acts as the electrophilic center that is targeted by an incoming nucleophile?

    A.

    The Carbon atom

    B.

    The Halogen atom

    C.

    The Hydrogen atom

    D.

    The entire RR group

  3. 3.

    In the SN1S_N1 mechanism, the rate of reaction is fastest when the leaving group is attached to a:

    A.

    Primary carbon

    B.

    Secondary carbon

    C.

    Tertiary carbon

    D.

    Methyl carbon

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

Optical rotation

Subtopic

Optical rotation under Haloalkanes and Haloarenes for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    The rotation produced by a solution is observed to be +15+15^\circ for a path length of 1 dm. If the path length is increased to 2 dm, the observed rotation will be:

    A.

    +7.5+7.5^\circ

    B.

    +15+15^\circ

    C.

    +30+30^\circ

    D.

    00^\circ

  2. 2.

    Nicol prism is made of which crystal?

    A.

    Quartz

    B.

    Calcite

    C.

    Mica

    D.

    Diamond

  3. 3.

    Which of these molecules is chiral?

    A.

    Propane

    B.

    1-Bromobutane

    C.

    2-Bromobutane

    D.

    2-Bromopropane

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

Reactions of haloarenes

Subtopic

Reactions of haloarenes under Haloalkanes and Haloarenes for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    Which of the following halogens is the most reactive in the Ullmann reaction?

    A.

    Fluorine

    B.

    Chlorine

    C.

    Bromine

    D.

    Iodine

  2. 2.

    The Friedel-Crafts reaction of chlorobenzene with CH3COClCH_3COCl is known as:

    A.

    Alkylation

    B.

    Acylation

    C.

    Sulphonation

    D.

    Nitration

  3. 3.

    Identify the compound C12H10C_{12}H_{10} formed in the Fittig reaction.

    A.

    Diphenylmethane

    B.

    Biphenyl

    C.

    Naphthalene

    D.

    Anthracene

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

Polyhalogen compounds

Subtopic

Polyhalogen compounds under Haloalkanes and Haloarenes for Grade 12 ICSE.

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Preview questions (no answers)

  1. 1.

    Which of the following is the formula for Chloropicrin?

    A.

    CHCl2NO2CHCl_{2}NO_{2}

    B.

    CCl3NO2CCl_{3}NO_{2}

    C.

    CH2ClNO2CH_{2}ClNO_{2}

    D.

    CCl4NO2CCl_{4}NO_{2}

  2. 2.

    The use of CCl4CCl_{4} as a dry cleaning agent has decreased because it causes damage to the:

    A.

    Heart

    B.

    Ozone layer

    C.

    Fabric elasticity

    D.

    Dye of the clothes

  3. 3.

    Which polyhalogen compound can cause dizziness and nausea when its vapors are inhaled in moderate amounts?

    A.

    Dichloromethane

    B.

    Sodium chloride

    C.

    Calcium carbonate

    D.

    Magnesium sulfate

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 (ICSE) | Krit.club