Organic Chemistry: Master the Fundamentals for Sixth Form College

Question 1

Which of the following is not considered a functional group in organic chemistry?

Accepted Answer

Inorganic salt

Answer

Alcohol

Answer

Ketone

Answer

Aldehyde

Question 2

Which of the following reactions exemplifies the concept of electrophilic addition?

Accepted Answer

Addition of HBr to an alkene

Answer

Hydrogenation of an alkene

Answer

Hydrolysis of an ester

Answer

Substitution of an alkyl halide with NaOH

Question 3

Which of the listed compounds has the highest boiling point?

Accepted Answer

Pentane

Answer

Butane

Answer

Propane

Answer

Ethane

Question 4

What hybridization do the carbon atoms in a benzene ring adopt?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 5

Which of the following is **not** considered a functional group in organic chemistry?

Accepted Answer

Carbon

Answer

Alcohol

Answer

Ketone

Answer

Ester

Question 6

What is the hybridization of the carbon atoms in the carbon-carbon triple bond of an alkyne?

Accepted Answer

sp

Answer

sp2

Answer

sp3

Answer

sp3d

Question 7

Which of the following species is a nucleophile?

Accepted Answer

OH-

Answer

H+

Answer

CH3CH2Br

Answer

CH3COOH

Question 8

What is the major product of the following reaction: CH3CH=CH2 + H2O in the presence of an acid catalyst?

Accepted Answer

CH3CH(OH)CH3

Answer

CH3CH2CH2OH

Answer

CH3CHO

Answer

CH3COOH

Question 9

Identify the functional group present in alcohols:

Accepted Answer

Alcohol (-OH)

Answer

Carboxylic acid (-COOH)

Answer

Ketone (-C=O)

Answer

Amine (-NH2)

Question 10

Which of the following reactions is used to synthesize alkenes?

Accepted Answer

Dehydration of an alcohol

Answer

Hydrogenation of an alkene

Answer

Hydrolysis of an ester

Answer

Oxidation of an alkane

Question 11

What is the hybridization of the carbon atoms in alkanes?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 12

Which of the following molecules exhibits geometric isomerism?

Accepted Answer

2-Butene

Answer

Butane

Answer

Propane

Answer

Ethane

Question 13

In the molecule CH3CH=CH2, what is the hybridization of the carbon atom in the double bond?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 14

Which reagent is used to convert an alkene into a diol?

Accepted Answer

KMnO4

Answer

H2/Pd

Answer

NaOH

Answer

HBr

Question 15

In the molecule CH3CH2CH=CH2, what is the hybridization of the carbon atoms in the single bonds?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 16

When CH3CH=CH2 reacts with HBr, what is the major product?

Accepted Answer

CH3CHBrCH3

Answer

CH3CH2CH2Br

Answer

CH2BrCH=CH2

Answer

CH3CHBrCH2Br

Question 17

Which reaction is most likely to produce an alkene?

Accepted Answer

Dehydration of an alcohol

Answer

Reaction of an alcohol with a carboxylic acid

Answer

Reaction of an alkane with hydrogen

Answer

Hydrolysis of an ester

Question 18

What is the hybridization of carbon atoms in an alkene's double bond?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 19

Which alkene has the highest boiling point?

Accepted Answer

Hex-1-ene

Answer

But-1-ene

Answer

2-Methylpropene

Answer

Pent-2-ene

Question 20

What is the structural formula of propene?

Accepted Answer

CH3-CH=CH2

Answer

CH2=CH-CH3

Answer

CH3-CH2-CH=CH2

Answer

CH2-CH=CH-CH3

Question 21

What is the hybridization and molecular geometry around the carbon atoms in a carbon-carbon triple bond?

Accepted Answer

sp, linear

Answer

sp2, trigonal planar

Answer

sp3, tetrahedral

Answer

sp3d, trigonal bipyramidal

Question 22

The process of adding hydrogen to an alkene is known as:

Accepted Answer

Reduction

Answer

Oxidation

Answer

Hydrolysis

Answer

Polymerization

Question 23

Which functional group is present in carboxylic acids and contributes to their acidic properties?

Accepted Answer

-COOH

Answer

-OH

Answer

-NH2

Answer

-C=O

Question 24

What type of hybridization is exhibited by the carbon atoms involved in the C=C double bond?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 25

Which technique is employed to separate organic compounds based on their boiling points?

Accepted Answer

Distillation

Answer

Chromatography

Answer

Spectroscopy

Answer

Titration

Question 26

Determine the general formula for alkanes, which are hydrocarbons characterized by single bonds between carbon atoms.

Accepted Answer

CnH2n+2

Answer

CnH2n

Answer

CnH2n+1

Answer

CnH2n-2

Question 27

Identify the type of isomerism exhibited by cis-2-butene and trans-2-butene, which are isomers that differ in the spatial arrangement of their atoms.

Accepted Answer

Stereoisomerism

Answer

Structural isomerism

Answer

Conformational isomerism

Answer

Tautomerism

Question 28

Predict the product of the following nucleophilic substitution reaction: CH₃CH₂Br + NaOCH₃ → ?

Accepted Answer

CH₃CH₂OCH₃

Answer

CH₃CH₂OH

Answer

CH₃CH₂Br

Answer

NaBr

Question 29

What is the hybridization of the carbon atom in the C-C bond that is attached to a hydrogen atom and another carbon atom in an alkane?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 30

Which of the following reagents can be used to convert an alkene into an alkane by addition?

Accepted Answer

Hydrogen gas with palladium catalyst

Answer

Bromine water

Answer

Potassium permanganate

Answer

Sodium amide

Question 31

What is the major product of the following reaction: CH3-CH=CH2 + HBr → ?

Accepted Answer

CH3-CHBr-CH3

Answer

CH3-CH2-CH2Br

Answer

CH2=CH-CH2Br

Answer

CH3-CBr=CH2

Question 32

Which of the following functional groups has the highest priority according to the Cahn-Ingold-Prelog (CIP) rules?

Accepted Answer

-COOH

Answer

-OH

Answer

-NH2

Answer

-CN

Question 33

Which of the following compounds is an electrophile?

Accepted Answer

H+

Answer

CH3-CH2-OH

Answer

NH3

Answer

CH3-CH=CH2

Question 34

Name the following compound according to IUPAC nomenclature: CH3CH2CH(CH3)CH2CH3

Accepted Answer

3-methylpentane

Answer

4-methylpentane

Answer

2-methylpentane

Answer

1,1-dimethylbutane

Question 35

Identify the functional group present in ethanol (CH3CH2OH):

Accepted Answer

Alcohol

Answer

Ether

Answer

Aldehyde

Answer

Ketone

Question 36

Which of the following is an example of an addition reaction?

Accepted Answer

Reaction of an alkene with hydrogen

Answer

Reaction of an alkane with chlorine

Answer

Reaction of an alcohol with sodium hydroxide

Answer

Reaction of a carboxylic acid with an amine

Question 37

Which of the following molecules is chiral?

Accepted Answer

2-bromobutane

Answer

propane

Answer

ethane

Answer

methane

Question 38

Identify the reagent that can oxidize a primary alcohol to an aldehyde:

Accepted Answer

PCC

Answer

LAH

Answer

NaBH4

Answer

H2SO4

Question 39

Which of the following is a nucleophilic reagent?

Accepted Answer

OH-

Answer

H+

Answer

H2O

Answer

CH3Br

Question 40

Which of the following is a fundamental characteristic of organic compounds?

Accepted Answer

They contain carbon

Answer

They are all colorless

Answer

They are all gases

Answer

They are all soluble in water

Question 41

Which of the following is an alkene, characterized by the presence of a carbon-carbon double bond?

Accepted Answer

Ethene

Answer

Butane

Answer

Propane

Answer

Ethane

Question 42

Determine the IUPAC name for the following compound: CH3-CH=CH-CH2-CH3.

Accepted Answer

Pent-2-ene

Answer

Hex-2-ene

Answer

But-1-ene

Question 43

Which of the following reactions is an example of an addition reaction, where two or more molecules combine to form a single product?

Accepted Answer

Hydrogenation of an alkene

Answer

Substitution of an alkyl halide

Answer

Combustion of an alkane

Answer

Elimination of an alcohol

Question 44

Which of the following molecules is chiral, meaning it cannot be superimposed on its mirror image?

Accepted Answer

2-Bromobutane

Answer

Methane

Answer

Ethene

Answer

Propane

Question 45

Predict the product of the following reaction: CH3CH2Br + NaOH → ?

Accepted Answer

CH3CH2OH

Answer

CH2=CH2

Answer

CH3COOH

Answer

CH3CH2Br

Question 46

Which of the following methods can be used for the preparation of alkenes?

Accepted Answer

Dehydration of alcohols

Answer

Hydrogenation of alkanes

Answer

Addition of hydrogen cyanide to aldehydes

Answer

Oxidation of aldehydes