krit.club logo

Organic Chemistry

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

Nomenclature and homologous series

Subtopic

Nomenclature and homologous series under Organic Chemistry for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Members of the same homologous series have the same:

    A.

    Molecular formula

    B.

    Empirical formula

    C.

    Functional group

    D.

    Physical state

  2. 2.

    What is the name of the alkene that contains three carbon atoms?

    A.

    Ethene

    B.

    Propene

    C.

    Butene

    D.

    Pentene

  3. 3.

    Which of the following formulas represents an alcohol?

    A.

    C2H6C_{2}H_{6}

    B.

    C2H4C_{2}H_{4}

    C.

    C2H5OHC_{2}H_{5}OH

    D.

    CH3COOHCH_{3}COOH

Download the worksheet for Organic Chemistry - Nomenclature and homologous series to practice offline. It includes additional chapter-level practice questions.

Alkanes

Subtopic

Alkanes under Organic Chemistry for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the name of the reactive species CH3⋅CH_3\cdot formed during the chlorination of methane?

    A.

    Methyl radical

    B.

    Methyl ion

    C.

    Methane molecule

    D.

    Carbocation

  2. 2.

    Why do alkanes not mix with water?

    A.

    They are polar

    B.

    They are non-polar

    C.

    They are too heavy

    D.

    They react with water

  3. 3.

    In organic chemistry, which prefix is used to denote a chain of five carbon atoms?

    A.

    But-

    B.

    Hex-

    C.

    Pent-

    D.

    Prop-

Download the worksheet for Organic Chemistry - Alkanes to practice offline. It includes additional chapter-level practice questions.

Alkenes

Subtopic

Alkenes under Organic Chemistry for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following compounds will react with iodine in an addition reaction?

    A.

    Methane

    B.

    Ethane

    C.

    Propene

    D.

    Propane

  2. 2.

    How many isomers (structural) of C4H8C_4H_8 are straight-chain alkenes?

    A.

    1

    B.

    2

    C.

    3

    D.

    4

  3. 3.

    When ethene burns in a limited supply of air, it burns with a sooty flame. What causes the soot?

    A.

    Unburnt carbon

    B.

    Carbon dioxide

    C.

    Water vapor

    D.

    Nitrogen

Download the worksheet for Organic Chemistry - Alkenes to practice offline. It includes additional chapter-level practice questions.

Alcohols

Subtopic

Alcohols under Organic Chemistry for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In a homologous series of alcohols, by what mass and group does each member differ from the next?

    A.

    14 units (CH2CH_2)

    B.

    16 units (OO)

    C.

    1 unit (HH)

    D.

    12 units (CC)

  2. 2.

    What type of intermolecular force is primarily responsible for the higher boiling points of alcohols compared to alkanes?

    A.

    Ionic bonding

    B.

    Hydrogen bonding

    C.

    Metallic bonding

    D.

    Van der Waals forces only

  3. 3.

    How many hydrogen atoms are in a molecule of pentan-1-ol?

    A.

    10

    B.

    11

    C.

    12

    D.

    13

Download the worksheet for Organic Chemistry - Alcohols to practice offline. It includes additional chapter-level practice questions.

Carboxylic acids

Subtopic

Carboxylic acids under Organic Chemistry for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the systematic IUPAC name for the acid with the formula HCOOHHCOOH?

    A.

    Formic acid

    B.

    Ethanoic acid

    C.

    Methanoic acid

    D.

    Carbonic acid

  2. 2.

    What is the result of the reaction between Zinc and ethanoic acid?

    A.

    Zinc ethanoate and hydrogen

    B.

    Zinc ethanoate and water

    C.

    Zinc oxide and ethane

    D.

    No reaction

  3. 3.

    Which ion is produced by all carboxylic acids when they dissociate in water?

    A.

    OH−OH^-

    B.

    H+H^+

    C.

    Na+Na^+

    D.

    CO32−CO_3^{2-}

Download the worksheet for Organic Chemistry - Carboxylic acids to practice offline. It includes additional chapter-level practice questions.

Polymers (Addition and Condensation)

Subtopic

Polymers (Addition and Condensation) under Organic Chemistry for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If a polymer has a backbone consisting of alternating carbon and oxygen atoms, it is most likely a:

    A.

    Polyalkene

    B.

    Polyester

    C.

    Poly(ethene)

    D.

    Poly(chloroethene)

  2. 2.

    Which statement about addition polymers is correct?

    A.

    They are usually biodegradable

    B.

    They are formed from unsaturated monomers

    C.

    They contain amide linkages

    D.

    They release water during formation

  3. 3.

    Which polymer is formed by the condensation of many glucose units?

    A.

    Protein

    B.

    Starch

    C.

    Nylon

    D.

    Terylene

Download the worksheet for Organic Chemistry - Polymers (Addition and Condensation) to practice offline. It includes additional chapter-level practice questions.

Organic Chemistry - Grade 12 Chemistry (IGCSE) | Krit.club