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Amines

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

Structure and Classification

Subtopic

Structure and Classification under Amines for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the IUPAC name of the compound (CH3)2CHNH2(CH_{3})_{2}CHNH_{2}?

    A.

    Isopropylamine

    B.

    Propan-1-amine

    C.

    Propan-2-amine

    D.

    2-Methylethanamine

  2. 2.

    In the structure of amines, the geometry around the nitrogen atom is described as:

    A.

    Tetrahedral

    B.

    Trigonal pyramidal

    C.

    Trigonal planar

    D.

    Linear

  3. 3.

    What is the hybridization of the nitrogen atom in a molecule of trimethylamine?

    A.

    spsp

    B.

    sp2sp^{2}

    C.

    sp3sp^{3}

    D.

    sp3dsp^{3}d

Download the worksheet for Amines - Structure and Classification to practice offline. It includes additional chapter-level practice questions.

Nomenclature and Preparation

Subtopic

Nomenclature and Preparation under Amines for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The Hoffmann bromamide degradation reaction is a method used for the preparation of which of the following?

    A.

    Secondary amines with same number of carbons

    B.

    Tertiary amines with more carbons

    C.

    Quaternary ammonium salts

    D.

    Primary amines with one carbon less than the parent amide

  2. 2.

    Which of the following compounds is classified as a secondary (2∘2^\circ) amine?

    A.

    CH3−NH−CH2CH3CH_3-NH-CH_2CH_3

    B.

    CH3CH2NH2CH_3CH_2NH_2

    C.

    (CH3)3N(CH_3)_3N

    D.

    C6H5NH2C_6H_5NH_2

  3. 3.

    Which reagent is industrially preferred for the reduction of nitrobenzene to aniline because the FeCl2FeCl_2 formed gets hydrolyzed to release HClHCl, requiring only a small amount of the acid to initiate the reaction?

    A.

    LiAlH4LiAlH_4 in ether

    B.

    H2/PdH_2/Pd in ethanol

    C.

    Fe/HClFe/HCl

    D.

    Sn/HClSn/HCl

Download the worksheet for Amines - Nomenclature and Preparation to practice offline. It includes additional chapter-level practice questions.

Physical and Chemical Properties

Subtopic

Physical and Chemical Properties under Amines for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Lower aliphatic amines are found to be soluble in water. What is the most likely reason for this physical property?

    A.

    They have very high molecular masses

    B.

    They are non-polar molecules

    C.

    They are more dense than water

    D.

    They can form hydrogen bonds with water molecules

  2. 2.

    The Carbylamine reaction is a characteristic test used to identify which of the following?

    A.

    Primary amines only

    B.

    Secondary amines only

    C.

    Tertiary amines only

    D.

    Both primary and secondary amines

  3. 3.

    Which of the following compounds will have the highest boiling point?

    A.

    (CH3)3N(CH_3)_3N

    B.

    CH3CH2CH2NH2CH_3CH_2CH_2NH_2

    C.

    CH3CH2NHCH3CH_3CH_2NHCH_3

    D.

    CH3CH2CH2CH3CH_3CH_2CH_2CH_3

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

Method of Preparation of Diazonium Salts

Subtopic

Method of Preparation of Diazonium Salts under Amines for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which type of amine is the most suitable starting material for preparing a diazonium salt that is stable enough to be used in further synthetic reactions at 0∘C0^\circ C?

    A.

    Primary aromatic amines

    B.

    Secondary aliphatic amines

    C.

    Tertiary aromatic amines

    D.

    Primary aliphatic amines

  2. 2.

    The conversion of a primary aromatic amine into its diazonium salt using nitrous acid is scientifically termed as:

    A.

    Ammonolysis

    B.

    Nitration

    C.

    Diazotization

    D.

    Carbylamine reaction

  3. 3.

    Which combination of reagents is typically used to generate nitrous acid (HNO2HNO_2) in situ during the diazotization process?

    A.

    NH4ClNH_4Cl and NaOHNaOH

    B.

    NaNO3NaNO_3 and H2SO4H_2SO_4

    C.

    NaClNaCl and HNO3HNO_3

    D.

    NaNO2NaNO_2 and HClHCl

Download the worksheet for Amines - Method of Preparation of Diazonium Salts to practice offline. It includes additional chapter-level practice questions.

Importance of Diazonium Salts in Synthesis of Aromatic Compounds

Subtopic

Importance of Diazonium Salts in Synthesis of Aromatic Compounds under Amines for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    At what temperature range is benzene diazonium chloride typically stable in aqueous solution for synthetic purposes?

    A.

    100−110∘C100 - 110^{\circ}C

    B.

    0−5∘C0 - 5^{\circ}C

    C.

    25−30∘C25 - 30^{\circ}C

    D.

    50−60∘C50 - 60^{\circ}C

  2. 2.

    Which of the following processes is used to prepare fluorobenzene from benzene diazonium chloride?

    A.

    Sandmeyer reaction

    B.

    Gattermann reaction

    C.

    Balz-Schiemann reaction

    D.

    Coupling reaction

  3. 3.

    In the Sandmeyer reaction, which of the following reagents is used to convert benzene diazonium chloride into chlorobenzene?

    A.

    CuCl/HClCuCl/HCl

    B.

    Cu/HClCu/HCl

    C.

    Cl2/FeCl3Cl_2/FeCl_3

    D.

    HCl/H2OHCl/H_2O

Download the worksheet for Amines - Importance of Diazonium Salts in Synthesis of Aromatic Compounds to practice offline. It includes additional chapter-level practice questions.

Amines - CBSE Class 12 Chemistry Notes & Revision | Krit.club