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Organic Chemistry – Some Basic Principles and Techniques

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

General Introduction

Subtopic

General Introduction under Organic Chemistry – Some Basic Principles and Techniques for Grade 11 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In the molecule CH2=CH−CNCH_{2}=CH-CN, what is the hybridization of the carbon atom in the nitrile (−CN-CN) group?

    A.

    sp3sp^{3}

    B.

    sp2sp^{2}

    C.

    spsp

    D.

    dsp2dsp^{2}

  2. 2.

    Which type of orbital overlap results in the formation of a sigma (σ\sigma) bond?

    A.

    Lateral overlap of p-orbitals

    B.

    End-to-end overlap of atomic orbitals

    C.

    Overlap of d-orbitals only

    D.

    Sideways overlap of s-orbitals

  3. 3.

    Which of the following is NOT an organic compound according to modern definitions?

    A.

    Methane

    B.

    Urea

    C.

    Sodium Carbonate

    D.

    Ethanol

Download the worksheet for Organic Chemistry – Some Basic Principles and Techniques - General Introduction to practice offline. It includes additional chapter-level practice questions.

Classification of Organic Compounds

Subtopic

Classification of Organic Compounds under Organic Chemistry – Some Basic Principles and Techniques for Grade 11 CBSE.

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Preview questions (no answers)

  1. 1.

    The term 'Aliphatic' was originally derived from the Greek word for:

    A.

    Sweet

    B.

    Fat

    C.

    Ring

    D.

    Oil

  2. 2.

    Which of these is NOT a heteroatom in the context of heterocyclic organic chemistry?

    A.

    Oxygen

    B.

    Nitrogen

    C.

    Carbon

    D.

    Sulfur

  3. 3.

    Which of the following describes an unsaturated compound?

    A.

    It contains only carbon-carbon single bonds

    B.

    It contains at least one carbon-carbon double or triple bond

    C.

    It contains a heteroatom in the ring

    D.

    It is always cyclic

Download the worksheet for Organic Chemistry – Some Basic Principles and Techniques - Classification of Organic Compounds to practice offline. It includes additional chapter-level practice questions.

IUPAC Nomenclature of Organic Compounds

Subtopic

IUPAC Nomenclature of Organic Compounds under Organic Chemistry – Some Basic Principles and Techniques for Grade 11 CBSE.

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Preview questions (no answers)

  1. 1.

    What is the IUPAC name for the compound CH3−CH2−CH2−FCH_{3}-CH_{2}-CH_{2}-F?

    A.

    1-fluoropropane

    B.

    2-fluoropropane

    C.

    Fluoromethane

    D.

    Fluoroethane

  2. 2.

    What is the IUPAC name for the diene CH2=CH−CH=CH2CH_{2}=CH-CH=CH_{2}?

    A.

    Buta-1,2-diene

    B.

    Buta-1,3-diene

    C.

    Prop-1,2-diene

    D.

    Butene

  3. 3.

    What is the IUPAC name for CH3−CO−CH3CH_{3}-CO-CH_{3}?

    A.

    Ethanone

    B.

    Propanal

    C.

    Propanone

    D.

    Butanone

Download the worksheet for Organic Chemistry – Some Basic Principles and Techniques - IUPAC Nomenclature of Organic Compounds to practice offline. It includes additional chapter-level practice questions.

Isomerism

Subtopic

Isomerism under Organic Chemistry – Some Basic Principles and Techniques for Grade 11 CBSE.

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Preview questions (no answers)

  1. 1.

    Which of the following alkanes does not show isomerism?

    A.

    Butane

    B.

    Ethane

    C.

    Pentane

    D.

    Hexane

  2. 2.

    Metamerism is most commonly observed in which of the following functional groups?

    A.

    -OH

    B.

    -CHO

    C.

    -O-

    D.

    -COOH

  3. 3.

    The total number of structural isomers possible for the molecular formula C3H6OC_3H_6O is (including aldehydes, ketones and alcohols/ethers with rings/unsaturation):

    A.

    2

    B.

    5

    C.

    7

    D.

    9

Download the worksheet for Organic Chemistry – Some Basic Principles and Techniques - Isomerism to practice offline. It includes additional chapter-level practice questions.

Fundamental Concepts in Organic Reaction Mechanism

Subtopic

Fundamental Concepts in Organic Reaction Mechanism under Organic Chemistry – Some Basic Principles and Techniques for Grade 11 CBSE.

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Preview questions (no answers)

  1. 1.

    In hyperconjugation, which type of orbital overlap occurs between the C−HC-H sigma bond and the adjacent pi system?

    A.

    σ−pσ-p overlap

    B.

    σ−σσ-σ overlap

    C.

    π−ππ-π overlap

    D.

    p−pp-p overlap

  2. 2.

    Which effect explains why the C−ClC-Cl bond in vinyl chloride is shorter than in ethyl chloride?

    A.

    Inductive effect

    B.

    Resonance effect

    C.

    Electromeric effect

    D.

    Steric effect

  3. 3.

    Which of the following species acts as a Lewis acid during an organic reaction?

    A.

    AlCl3AlCl_3

    B.

    NH3NH_3

    C.

    H2OH_2O

    D.

    R−OHR-OH

Download the worksheet for Organic Chemistry – Some Basic Principles and Techniques - Fundamental Concepts in Organic Reaction Mechanism to practice offline. It includes additional chapter-level practice questions.

Electronic Displacements (Inductive, Electromeric, Resonance, Hyperconjugation)

Subtopic

Electronic Displacements (Inductive, Electromeric, Resonance, Hyperconjugation) under Organic Chemistry – Some Basic Principles and Techniques for Grade 11 CBSE.

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Preview questions (no answers)

  1. 1.

    Between the Inductive effect and the Resonance effect, which one is generally stronger and more dominant in determining reactivity?

    A.

    Inductive effect

    B.

    Resonance effect

    C.

    They are always equal

    D.

    The temporary effect

  2. 2.

    Which property must resonance structures share?

    A.

    Same atomic arrangements

    B.

    Same total charge

    C.

    Same energy level

    D.

    Both same atomic arrangements and same total charge

  3. 3.

    The C−ClC-Cl bond in methyl chloride is polar due to:

    A.

    Electromeric effect

    B.

    Inductive effect

    C.

    Resonance

    D.

    Hyperconjugation

Download the worksheet for Organic Chemistry – Some Basic Principles and Techniques - Electronic Displacements (Inductive, Electromeric, Resonance, Hyperconjugation) to practice offline. It includes additional chapter-level practice questions.

Methods of Purification of Organic Compounds

Subtopic

Methods of Purification of Organic Compounds under Organic Chemistry – Some Basic Principles and Techniques for Grade 11 CBSE.

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Preview questions (no answers)

  1. 1.

    In the distillation of a mixture of water and ethanol, which component is collected first in the receiver?

    A.

    Water (higher boiling point)

    B.

    Ethanol (lower boiling point)

    C.

    Both at the same time

    D.

    Neither, they form a solid

  2. 2.

    For the crystallization of sugar, which solvent is generally used?

    A.

    Benzene

    B.

    Water

    C.

    Ether

    D.

    Chloroform

  3. 3.

    Which of the following is an example of a partition chromatography?

    A.

    Column chromatography

    B.

    Thin layer chromatography

    C.

    Paper chromatography

    D.

    Gas-solid chromatography

Download the worksheet for Organic Chemistry – Some Basic Principles and Techniques - Methods of Purification of Organic Compounds to practice offline. It includes additional chapter-level practice questions.

Qualitative and Quantitative Analysis

Subtopic

Qualitative and Quantitative Analysis under Organic Chemistry – Some Basic Principles and Techniques for Grade 11 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In the detection of carbon, the gas evolved is passed through lime water. What is the observed change?

    A.

    Lime water turns blue

    B.

    Lime water turns milky

    C.

    Lime water turns black

    D.

    No change

  2. 2.

    Which of the following is NOT required for the qualitative analysis of elements in an organic compound using the sodium fusion method?

    A.

    Sodium metal

    B.

    Ignition tube

    C.

    Distilled water

    D.

    A polarimeter

  3. 3.

    In the estimation of Phosphorus by weighing Mg2P2O7Mg_2P_2O_7, the 'magnesia mixture' consists of MgCl2MgCl_2, NH4ClNH_4Cl, and which other reagent?

    A.

    NaOHNaOH

    B.

    NH4OHNH_4OH

    C.

    KOHKOH

    D.

    H2SO4H_2SO_4

Download the worksheet for Organic Chemistry – Some Basic Principles and Techniques - Qualitative and Quantitative Analysis to practice offline. It includes additional chapter-level practice questions.

Organic Chemistry – Some Basic Principles and Techniques - Class 11 Chemistry (CBSE) | Krit.club