Organic Chemistry Grade 11 Worksheet with Answers & Notes

Naming and structural formulae (IUPAC)

Subtopic

Naming and structural formulae (IUPAC) under Organic Chemistry for Grade 11 IGCSE.

Preview questions (no answers)

1.
$In IUPAC naming, which ending is used to show that a molecule belongs to the alkene series?$
A. $-ane$
B. $-ol$
C. $-ene$
D. $-oic$
2.
$Which gas is the main component of natural gas and is named Methane?$
A. $C_2H_6$
B. $CH_4$
C. $C_3H_8$
D. $C_4H_{10}$
3.
$C_2H_6$
A. $Methane$
B. $Ethane$
C. $Ethene$
D. $Propane$
4.
$CH_3CH_2CH_2CH_2OH$
A. $Propan-1-ol$
B. $Butan-1-ol$
C. $Ethanol$
D. $Pentan-1-ol$
5.
$Which of these is the correct IUPAC name for an alkene with 4 carbons and a double bond between the second and third carbons?$
A. $But-1-ene$
B. $But-2-ene$
C. $Cyclobutane$
D. $2-methylpropene$
6.
$CH_3(CH_2)_4COOH$
A. $Pentanoic acid$
B. $Hexanoic acid$
C. $Heptanoic acid$
D. $Butanoic acid$
7.
$CH_3COOCH_2CH_3$
A. $Ethyl ethanoate$
B. $Methyl ethanoate$
C. $Ethyl methanoate$
D. $Propyl ethanoate$
8.
$CH_3CH_2CH_2CH_2COOCH_2CH_3$
A. $Ethyl pentanoate$
B. $Pentyl ethanoate$
C. $Ethyl butanoate$
D. $Butyl ethanoate$
9.
$CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3$
A. $3-methylheptane$
B. $5-methylheptane$
C. $2-ethylhexane$
D. $3-methyloctane$
10.
$CH_3CCl_2CH_3$
A. $2,2-dichloropropane$
B. $1,2-dichloropropane$
C. $1,1-dichloropropane$
D. $Dichloropropane$

Download the worksheet for Organic Chemistry - Naming and structural formulae (IUPAC) to practice offline. It includes additional chapter-level practice questions.

Homologous series

Subtopic

Homologous series under Organic Chemistry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$In the series of carboxylic acids, which member is found in stinging ants?$
A. $Ethanoic acid$
B. $Methanoic acid$
C. $Propanoic acid$
D. $Butanoic acid$
2.
$Which hydrocarbon consists of three carbon atoms and only single bonds?$
A. $Propane$
B. $Propene$
C. $Ethane$
D. $Butane$
3.
$C_nH_{2n}$
A. $Alkanes$
B. $Alkenes$
C. $Alcohols$
D. $Carboxylic acids$
4.
$Compared to larger molecules in a series, smaller molecules are generally:$
A. $Less flammable$
B. $More flammable$
C. $More viscous$
D. $Higher boiling$
5.
$Which of the following represents the molecular formula of the sixth member of the alkane series?$
A. $C_6H_{12}$
B. $C_6H_{14}$
C. $C_5H_{12}$
D. $C_7H_{16}$
6.
$Which compound is the first member of the alkene series?$
A. $Methene$
B. $Ethene$
C. $Propene$
D. $Butene$
7.
$Which of the following properties is NOT a characteristic of a homologous series?$
A. $Same general formula$
B. $Gradation in physical properties$
C. $Identical physical properties$
D. $Similar chemical properties$
8.
$C_6H_{12}$
A. $Alkanes and Alkenes$
B. $Alkenes and Cycloalkanes$
C. $Alkanes and Cycloalkanes$
D. $Alkenes and Alcohols$
9.
$Which of the following compounds is the first member of the homologous series known as the ketones?$
A. $Methanone$
B. $Ethanone$
C. $Propanone$
D. $Butanone$
10.
$What is the empirical formula of the fourth member of the alkene homologous series?$
A. $CH$
B. $CH_2$
C. $C_2H_4$
D. $C_5H_{10}$

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

Alkanes (Substitution reactions)

Subtopic

Alkanes (Substitution reactions) under Organic Chemistry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$What determines how many hydrogen atoms are replaced in an alkane during substitution with a halogen?$
A. $The temperature of the room$
B. $The amount of halogen available$
C. $The size of the reaction flask$
D. $The color of the light used$
2.
$C_{3}H_{8} + Br_{2} \rightarrow C_{3}H_{7}Br + HBr$
A. $Bromination$
B. $Hydrogenation$
C. $Hydration$
D. $Polymerization$
3.
$Which term best describes the alkanes in the context of their reactivity with halogens in the dark?$
A. $Highly reactive$
B. $Inert$
C. $Unreactive$
D. $Explosive$
4.
$In a laboratory, which piece of equipment is often used to provide the UV light for this reaction if sunlight is unavailable?$
A. $Bunsen burner$
B. $UV lamp$
C. $Water bath$
D. $Condenser$
5.
$In the chlorination of ethane, which of the following represents a termination step where two radicals combine?$
A. $Cl\cdot + Cl\cdot \rightarrow Cl_{2}$
B. $Cl_{2} \xrightarrow{UV} 2Cl\cdot$
C. $CH_{3}CH_{2}\cdot + Cl_{2} \rightarrow CH_{3}CH_{2}Cl + Cl\cdot$
D. $CH_{3}CH_{3} + Cl\cdot \rightarrow CH_{3}CH_{2}\cdot + HCl$
6.
$C_{n}H_{2n+2}$
A. $Methane$
B. $Ethane$
C. $Propane$
D. $Butane$
7.
$Which halogen reacts most slowly with alkanes in a substitution reaction under UV light?$
A. $Fluorine$
B. $Chlorine$
C. $Bromine$
D. $Iodine (which essentially does not react)$
8.
$Which of the following identifies the termination step that would result in a haloalkane product?$
A. $Cl• + Cl• \rightarrow Cl_{2}$
B. $CH_{3}• + CH_{3}• \rightarrow C_{2}H_{6}$
C. $CH_{3}• + Cl• \rightarrow CH_{3}Cl$
D. $CH_{3}• + HCl \rightarrow CH_{4} + Cl•$
9.
$H-Cl$
A. $It is much more soluble in water$
B. $It has a much higher boiling point$
C. $CH_{3}Cl$
D. $CH_{3}Cl$
10.
$Which of the following describes the change in hybridization of the carbon atom when methane is converted to chloromethane?$
A. $sp^{3}$
B. $sp^{2}$
C. $sp^{3}$
D. $sp^{3}$

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

Alkenes (Addition reactions)

Subtopic

Alkenes (Addition reactions) under Organic Chemistry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$What is the primary product of adding water (as steam) to an alkene in the presence of an acid catalyst?$
A. $An alkane$
B. $An alcohol$
C. $A ketone$
D. $An aldehyde$
2.
$Which of the following is produced when pent-1-ene reacts with hydrogen gas?$
A. $Pentane$
B. $Pentanol$
C. $Pentyne$
D. $Cyclopentane$
3.
$What is the prefix used for the product when ethene reacts with two chlorine atoms?$
A. $Methyl-$
B. $Ethyl-$
C. $Dichloro-$
D. $Monochloro-$
4.
$How many carbon atoms are present in the product molecule if propene reacts with chlorine?$
A. $One$
B. $Two$
C. $Three$
D. $Four$
5.
$C_3H_6 + HBr \rightarrow C_3H_7Br$
A. $Substitution$
B. $Combustion$
C. $Addition$
D. $Elimination$
6.
$C_6H_{12}$
A. $C_6H_{14}O$
B. $C_6H_{12}O$
C. $C_6H_{13}O$
D. $C_6H_{12}O_2$
7.
$Which of the following is NOT a product of an addition reaction involving an alkene?$
A. $Alcohol$
B. $Alkane$
C. $Dihaloalkane$
D. $Carbon dioxide$
8.
$Identify the conditions for the addition of hydrogen to ethene in the laboratory.$
A. $1$
B. $150^{\circ}C$
C. $300^{\circ}C$
D. $450^{\circ}C$
9.
$D_2$
A. $CH_2D-CH_2-CH_2-CH_3$
B. $CH_2D-CHD-CH_2-CH_3$
C. $CHD_2-CH_2-CH_2-CH_3$
D. $CH_3-CD_2-CH_2-CH_3$
10.
$C_3H_6$
A. $Poly(ethene)$
B. $Poly(propene)$
C. $Poly(chloroethene)$
D. $Poly(tetrafluoroethene)$

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

Alcohols (Fermentation and hydration)

Subtopic

Alcohols (Fermentation and hydration) under Organic Chemistry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of these is the correct formula for the third member of the alcohol series?$
A. $CH_3OH$
B. $C_2H_5OH$
C. $C_3H_7OH$
D. $C_4H_9OH$
2.
$In the series of alcohols, as the number of carbon atoms increases, what happens to the boiling point?$
A. $It increases$
B. $It decreases$
C. $It stays the same$
D. $It becomes zero$
3.
$Which raw material for ethanol production is non-renewable?$
A. $Sugar cane$
B. $Corn$
C. $Crude oil$
D. $Barley$
4.
$Which type of bonding exists between the carbon and oxygen atoms in an alcohol group?$
A. $Ionic$
B. $Metallic$
C. $Covalent$
D. $Hydrogen$
5.
$What type of bonding is present in an ethanol molecule?$
A. $Ionic only$
B. $Metallic only$
C. $Covalent only$
D. $Both ionic and covalent$
6.
$Which of the following is true regarding the sustainability of the two processes?$
A. $Fermentation is more sustainable as it uses renewable crops$
B. $Hydration is more sustainable as it uses infinite supplies of crude oil$
C. $Both are equally sustainable$
D. $Neither process is sustainable because they both produce ethanol$
7.
$Why is the hydration of ethene considered an addition reaction?$
A. $Because oxygen is added to the ethene$
B. $Because two reactants combine to form a single product$
C. $Because a water molecule is removed from the ethene$
D. $Because it adds carbon atoms to the chain$
8.
$Which observation would confirm that fermentation has ceased in a flask containing glucose and yeast?$
A. $Bubbles of gas stop forming in the limewater trap.$
B. $The solution turns from clear to cloudy.$
C. $The temperature of the flask drops to room temperature.$
D. $Both A and C.$
9.
$0.5\text{ moles}$
A. $24 dm³$
B. $12 dm³$
C. $48 dm³$
D. $6 dm³$
10.
$H_2SO_4$
A. $It is less corrosive and leads to fewer side reactions like polymerization.$
B. $It is more volatile and mixes better with the gases.$
C. $It allows the reaction to occur at room temperature.$
D. $It increases the yield of ethanol by shifting the equilibrium further.$

Download the worksheet for Organic Chemistry - Alcohols (Fermentation and hydration) to practice offline. It includes additional chapter-level practice questions.

Carboxylic acids (Ethanoic acid)

Subtopic

Carboxylic acids (Ethanoic acid) under Organic Chemistry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$If you mix ethanoic acid with an unknown white powder and bubbles of gas are produced that turn limewater cloudy, the powder is likely a...$
A. $Metal$
B. $Base$
C. $Carbonate$
D. $Alcohol$
2.
$Which of the following is the structural formula for methanoic acid?$
A. $CH_{3}COOH$
B. $HCOOH$
C. $CH_{3}CH_{2}COOH$
D. $CH_{3}OH$
3.
$Ethanoic acid reacts with sodium carbonate to release carbon dioxide gas. How can this gas be tested?$
A. $It relights a glowing splint.$
B. $It turns limewater milky.$
C. $It bleaches damp litmus paper.$
D. $It makes a 'pop' sound with a lighted splint.$
4.
$Which statement about members of the carboxylic acid homologous series is true?$
A. $They have different functional groups.$
B. $They have the same general formula.$
C. $They have the same physical properties.$
D. $They are all gases at room temperature.$
5.
$K_2CO_3$
A. $CH_3CH_2OK$
B. $CH_3COOK$
C. $CH_3COOK$
D. $K(CH_3COO)_2$
6.
$Which of the following represents the balanced equation for the complete combustion of ethanoic acid?$
A. $CH_3COOH + O_2 \rightarrow CO_2 + H_2O$
B. $CH_3COOH + 2O_2 \rightarrow 2CO_2 + 2H_2O$
C. $2CH_3COOH + 3O_2 \rightarrow 4CO_2 + 4H_2O$
D. $CH_3COOH + 3O_2 \rightarrow 2CO_2 + 2H_2O$
7.
$A sample of vinegar is titrated with sodium hydroxide. Vinegar is a dilute solution of:$
A. $Methanoic acid$
B. $Ethanoic acid$
C. $Ethanol$
D. $Sulfuric acid$
8.
$pH$
A. $pH$
B. $pH$
C. $pH$
D. $pH$
9.
$P$
A. $Calcium ethanoate$
B. $Calcium acetate$
C. $Both Calcium ethanoate and Calcium acetate are correct$
D. $Calcium carbide$
10.
$118^{\circ}C$
A. $Ethanoic acid molecules can form more extensive hydrogen bonding networks, including dimers.$
B. $Ethanoic acid is a larger molecule with a significantly higher molar mass.$
C. $Ethanoic acid contains a double bond which requires more energy to vibrate.$
D. $The carbon-carbon bond in ethanoic acid is stronger than in ethanol.$

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

Polymers (Addition and Condensation polymerization)

Subtopic

Polymers (Addition and Condensation polymerization) under Organic Chemistry for Grade 11 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of the following monomers is used in addition polymerization?$
A. $Ethane$
B. $Propene$
C. $Ethanol$
D. $Glucose$
2.
$Which of these is a synthetic polyamide?$
A. $Nylon$
B. $Starch$
C. $Terylene$
D. $Cellulose$
3.
$What is the linkage in a protein also commonly known as?$
A. $Peptide bond$
B. $Ionic bond$
C. $Metallic bond$
D. $Ester bond$
4.
$Why is poly(ethene) used for food wraps and bottles?$
A. $It is poisonous to bacteria$
B. $It is flexible, strong, and unreactive$
C. $It dissolves easily in water$
D. $It is a good conductor of electricity$
5.
$What is the general name for the small molecules that combine to form a polymer?$
A. $Polymers$
B. $Monomers$
C. $Isomers$
D. $Isotopes$
6.
$Which statement about synthetic polymers is FALSE?$
A. $They are made from monomers derived from crude oil.$
B. $They can be designed to have specific physical properties.$
C. $They all contain the same linkage as natural proteins.$
D. $They are often resistant to chemical attack.$
7.
$CF_{2}=CF_{2}$
A. $-[CF_{2}-CF_{2}]-$
B. $-[CF=CF]-$
C. $-[CF_{2}=CF_{2}]-$
D. $-[C-F]-$
8.
$C=C$
A. $It increases.$
B. $It decreases.$
C. $It remains exactly the same.$
D. $It becomes zero as the bond disappears.$
9.
$A polymer segment is -\[O-CH_{2}-CH_{2}-O-CO-C_{6}H_{4}-CO-O-CH_{2}-CH_{2}-O-CO-C_{6}H_{4}-CO\]-. How many ester linkages are shown in this specific segment?$
A. $2$
B. $4$
C. $6$
D. $8$
10.
$In the context of green chemistry, why is the synthesis of Poly(lactic acid) preferred over Poly(ethene)?$
A. $PLA is made from petroleum; Poly(ethene) is made from corn starch.$
B. $PLA is biodegradable and derived from renewable resources; Poly(ethene) is non-biodegradable and derived from fossil fuels.$
C. $PLA involves addition polymerization which is faster than condensation.$
D. $PLA contains no oxygen atoms making it easier to recycle.$

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

Organic Chemistry

Naming and structural formulae (IUPAC)

❓Preview questions (no answers)

Homologous series

❓Preview questions (no answers)

Alkanes (Substitution reactions)

❓Preview questions (no answers)

Alkenes (Addition reactions)

❓Preview questions (no answers)

Alcohols (Fermentation and hydration)

❓Preview questions (no answers)

Carboxylic acids (Ethanoic acid)

❓Preview questions (no answers)

Polymers (Addition and Condensation polymerization)

❓Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)