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Alcohols, Phenols and Ethers

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

Classification and Nomenclature

Subtopic

Classification and Nomenclature under Alcohols, Phenols and Ethers for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The IUPAC name of the ether with the formula CH3−O−CH(CH3)2CH_{3}-O-CH(CH_{3})_{2} is:

    A.

    Methyl isopropyl ether

    B.

    1-Methoxypropane

    C.

    Isopropoxymethane

    D.

    2-Methoxypropane

  2. 2.

    Which of the following molecules contains a secondary (2∘2^{\circ}) alcoholic group?

    A.

    2-Methylpropan-2-ol

    B.

    2-Methylpropan-1-ol

    C.

    Propan-2-ol

    D.

    Ethanol

  3. 3.

    What is the IUPAC name of the compound commonly known as Catechol?

    A.

    Benzene-1,3-diol

    B.

    Benzene-1,2-diol

    C.

    2-Methylphenol

    D.

    Benzene-1,4-diol

Download the worksheet for Alcohols, Phenols and Ethers - Classification and Nomenclature to practice offline. It includes additional chapter-level practice questions.

Structures of Functional Groups

Subtopic

Structures of Functional Groups under Alcohols, Phenols and Ethers for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In the structure of methoxymethane (CH3−O−CH3CH_3-O-CH_3), the C−O−CC-O-C bond angle is observed to be 111.7∘111.7^\circ. Why is this angle greater than the tetrahedral angle?

    A.

    Due to the small size of the oxygen atom

    B.

    Due to the high electronegativity of the methyl groups

    C.

    Due to the resonance effect in the ether linkage

    D.

    Due to the repulsive interaction between the two bulky methyl groups

  2. 2.

    In phenol, the −OH-OH group is attached to which type of hybridized carbon atom?

    A.

    spsp hybridized carbon

    B.

    sp3sp^3 hybridized carbon

    C.

    sp2sp^2 hybridized carbon

    D.

    sp3dsp^3d hybridized carbon

  3. 3.

    The C−O−HC-O-H bond angle in methanol (CH3OHCH_3OH) is slightly less than the tetrahedral angle (109∘28′109^\circ 28'). This is due to:

    A.

    The repulsion between the two lone pairs of electrons on oxygen

    B.

    The resonance effect of the methyl group

    C.

    The higher electronegativity of carbon compared to hydrogen

    D.

    The presence of a double bond character in the C−OC-O bond

Download the worksheet for Alcohols, Phenols and Ethers - Structures of Functional Groups to practice offline. It includes additional chapter-level practice questions.

Preparation and Properties of Alcohols and Phenols

Subtopic

Preparation and Properties of Alcohols and Phenols under Alcohols, Phenols and Ethers for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following statements correctly compares the acidity of phenol and ethanol?

    A.

    Ethanol is more acidic than phenol due to the +I effect of the ethyl group.

    B.

    Phenol is less acidic than ethanol because of resonance stabilization of phenol itself.

    C.

    Phenol is more acidic than ethanol because the phenoxide ion is stabilized by resonance.

    D.

    Both are equally acidic as they both contain the −OH-OH group.

  2. 2.

    Lucas reagent, used to distinguish between primary, secondary, and tertiary alcohols, consists of:

    A.

    Concentrated H2SO4H_2SO_4 and anhydrous ZnCl2ZnCl_2

    B.

    Concentrated HClHCl and anhydrous ZnCl2ZnCl_2

    C.

    Dilute HClHCl and anhydrous AlCl3AlCl_3

    D.

    Concentrated HClHCl and CuCl2CuCl_2

  3. 3.

    What is the major product obtained when propene reacts with B2H6B_2H_6 followed by oxidation with alkaline H2O2H_2O_2?

    A.

    Propan-1-ol

    B.

    Propan-2-ol

    C.

    Propanone

    D.

    Propane

Download the worksheet for Alcohols, Phenols and Ethers - Preparation and Properties of Alcohols and Phenols to practice offline. It includes additional chapter-level practice questions.

Commercial Importance of some Alcohols

Subtopic

Commercial Importance of some Alcohols under Alcohols, Phenols and Ethers for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Ingestion of even small quantities of methanol can be fatal or cause permanent damage to which organ/system in the human body?

    A.

    Auditory nerves

    B.

    Optic nerves (causing blindness)

    C.

    Digestive system (causing ulcers)

    D.

    Skin (causing dermatitis)

  2. 2.

    Commercial ethanol is often made unfit for drinking by adding small amounts of copper sulphate (for color) and pyridine (a foul-smelling liquid). This process is known as:

    A.

    Fermentation

    B.

    Esterification

    C.

    Denaturation

    D.

    Proofing

  3. 3.

    Which of the following alcohols is commonly referred to as 'Wood Spirit' because it was originally produced by the destructive distillation of wood?

    A.

    Ethanol

    B.

    Propan-2-ol

    C.

    Methanol

    D.

    Benzyl alcohol

Download the worksheet for Alcohols, Phenols and Ethers - Commercial Importance of some Alcohols to practice offline. It includes additional chapter-level practice questions.

Preparation and Properties of Ethers

Subtopic

Preparation and Properties of Ethers under Alcohols, Phenols and Ethers for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the IUPAC name of the compound (CH3)2CH−O−CH3(CH_3)_2CH-O-CH_3?

    A.

    Methyl isopropyl ether

    B.

    2-Methoxypropane

    C.

    1-Methoxypropane

    D.

    Isopropoxymethane

  2. 2.

    Compare the boiling points of the following isomeric compounds: (I) nn-Butyl alcohol and (II) Diethyl ether. Which statement is correct?

    A.

    I has a higher boiling point than II due to intermolecular hydrogen bonding.

    B.

    II has a higher boiling point than I due to stronger dipole-dipole interactions.

    C.

    Both have identical boiling points because they are isomers.

    D.

    II has a higher boiling point because it is more symmetric.

  3. 3.

    Which of the following conditions is required for the dehydration of ethanol to produce ethoxyethane as the main product?

    A.

    Concentrated H2SO4H_2SO_4 at 443 K443\,K

    B.

    Concentrated H2SO4H_2SO_4 at 413 K413\,K

    C.

    Dilute H2SO4H_2SO_4 at 273 K273\,K

    D.

    Concentrated HClHCl at room temperature

Download the worksheet for Alcohols, Phenols and Ethers - Preparation and Properties of Ethers to practice offline. It includes additional chapter-level practice questions.

Alcohols, Phenols and Ethers - Class 12 Chemistry (CBSE) | Krit.club