Organic Chemistry Introduction: Interactive Quizzes for BSc Chemistry Students

Question 1

Which of the following is the correct IUPAC name for the compound CH3CH2OH?

Accepted Answer

Ethanol

Answer

Ethyl alcohol

Answer

1-Propanol

Answer

2-Propanol

Question 2

Which functional group is responsible for the acidity of carboxylic acids?

Accepted Answer

-COOH

Answer

-OH

Answer

-NH2

Answer

-C=O

Question 3

What is the hybridization of carbon atoms in alkanes?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 4

What is the product of the SN2 reaction of CH3Br with NaOH?

Accepted Answer

CH3OH

Answer

CH3Br2

Answer

NaBr

Answer

H2O

Question 5

What is the major product of the E2 reaction of CH3CH2Br with KOH?

Accepted Answer

CH3CH=CH2

Answer

CH3CH2CH=CH2

Answer

CH3C≡CH

Answer

CH3CH2CH2Br

Question 6

Which of the following is the most stable carbocation?

Accepted Answer

(CH3)3C+

Answer

CH3+

Answer

CH3CH2+

Answer

(CH3)2CHCH2+

Question 7

What is the hybridization of the carbon atom in the carbonyl group of an aldehyde?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 8

Identify the functional group present in alcohols.

Accepted Answer

-OH

Answer

-COOH

Answer

-NH2

Answer

-C=O

Question 9

Provide the correct IUPAC name for the compound CH3CH2CH(CH3)CH2CH3.

Accepted Answer

2-Methylpentane

Answer

3-Methylpentane

Answer

2-Ethylbutane

Answer

3-Ethylbutane

Question 10

What is the hybridization of the central carbon atom in methane?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 11

Determine the hybridization of the nitrogen atom in ammonia.

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 12

Identify the type of organic reaction exemplified by the addition of HBr to an alkene.

Accepted Answer

Electrophilic addition

Answer

Nucleophilic addition

Answer

Electrophilic substitution

Answer

Nucleophilic substitution

Question 13

Predict the major product formed in the following reaction: 
 CH3CH=CH2 + HBr →

Accepted Answer

CH3CHBrCH3

Answer

CH3CBr=CH2

Answer

CH2BrCH=CH2

Answer

CH3CH2CH2Br

Question 14

Which of the following is a strong acid?

Accepted Answer

Hydrochloric acid

Answer

Acetic acid

Answer

Ethanol

Answer

Water

Question 15

What is the product of the reaction between an aldehyde and a primary amine?

Accepted Answer

Imine

Answer

Amide

Answer

Ketone

Answer

Alcohol

Question 16

Which of the following is a chiral molecule?

Accepted Answer

1-Propanol (CH3-CH(OH)-CH3)

Answer

Propane (CH3-CH2-CH3)

Answer

Propene (CH2=CH-CH3)

Answer

Ethylamine (CH3-CH2-NH2)

Question 17

Which of the following is NOT a characteristic of organic molecules?

Accepted Answer

Complete solubility in water

Answer

Covalent bonding

Answer

High energy content

Answer

Polarity

Question 18

Identify the functional group present in ethanol (CH3CH2OH).

Accepted Answer

Alcohol

Answer

Aldehyde

Answer

Ketone

Answer

Carboxylic acid

Question 19

Which of the following hybridization states is most commonly encountered in organic compounds?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 20

Identify the type of bond that is formed between two carbon atoms in ethane (C2H6).

Accepted Answer

Covalent bond

Answer

Ionic bond

Answer

Hydrogen bond

Answer

Metallic bond

Question 21

Which of the following statements about organic reactions is CORRECT?

Accepted Answer

Organic reactions require low activation energies to proceed.

Answer

Organic reactions typically occur instantaneously.

Answer

Organic reactions are usually irreversible.

Answer

Organic reactions do not involve the breaking and formation of bonds.

Question 22

Identify the functional group present in the compound CH3COOH.

Accepted Answer

Carboxylic acid

Answer

Amine

Answer

Aldehyde

Answer

Ester

Question 23

Which molecule is chiral?

Accepted Answer

CHClBr

Answer

H2O

Answer

CH2Cl2

Answer

CH4

Question 24

Which of the following properties is NOT characteristic of organic compounds?

Accepted Answer

Highly reactive

Answer

Composed primarily of carbon atoms

Answer

Covalently bonded

Answer

Generally have low boiling points

Question 25

How many valence electrons does a carbon atom possess?

Accepted Answer

4

Answer

1

Answer

2

Answer

8

Question 26

Provide the IUPAC name for the compound with the formula CH3CH2CH(CH3)CH2CH3.

Accepted Answer

2-methylpentane

Answer

3-methylpentane

Answer

4-methylpentane

Answer

2-ethylbutane

Question 27

Which hybridization state is associated with the carbon atom in a double bond?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 28

What is the shape of a molecule with sp3 hybridized carbon atoms?

Accepted Answer

Tetrahedral

Answer

Linear

Answer

Trigonal planar

Answer

Trigonal pyramidal

Question 29

Which compound is a structural isomer of butane?

Accepted Answer

2-methylpropane

Answer

Propane

Answer

Ethane

Answer

Pentane

Question 30

What factor primarily determines the polarity of a covalent bond?

Accepted Answer

The difference in electronegativity between the bonded atoms

Answer

The number of electrons in the bond

Answer

The length of the bond

Answer

The shape of the molecule

Question 31

Which of the following represents a resonance structure?

Accepted Answer

A Lewis structure illustrating electron movement

Answer

A Lewis structure showing lone pairs and bonds

Answer

A Lewis structure depicting the hybridization of atoms

Answer

A Lewis structure showing the molecular geometry

Question 32

What is the hybridization of the carbon atoms in benzene?

Accepted Answer

sp2

Answer

sp

Answer

sp3

Answer

sp3d

Question 33

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

Accepted Answer

They possess carbon atoms as part of their molecular structure.

Answer

They exhibit low solubility in aqueous solutions.

Answer

Their physical state at room temperature is typically solid.

Question 34

In methane (CH₄), the hybridization of its carbon atom is:

Accepted Answer

sp³

Answer

sp

Answer

sp³d

Answer

sp²

Question 35

Butane (C4H10) has a structural isomer. Which of the following is that isomer?

Accepted Answer

2-Methylpropane

Answer

Ethene

Answer

Propene

Answer

Butene

Question 36

Which of the following molecules is classified as a polar covalent compound?

Accepted Answer

Water

Answer

Methane

Answer

Carbon dioxide

Answer

Nitrogen

Question 37

In benzene (C6H6), the hybridization of its carbon atoms is:

Accepted Answer

sp²

Answer

sp³

Answer

sp

Answer

sp³d

Question 38

The reaction of ethene with hydrogen is an example of which type of organic reaction?

Accepted Answer

Addition reaction

Answer

Elimination reaction

Answer

Condensation reaction

Answer

Substitution reaction

Question 39

Which statement does NOT describe a characteristic of organic compounds?

Accepted Answer

They predominantly form ionic bonds.

Answer

They contain carbon as a primary element.

Answer

They are essential components of living organisms.

Answer

They exhibit diverse and complex structures.

Question 40

What is the primary type of chemical bonding found in organic molecules?

Accepted Answer

Covalent bonding

Answer

Ionic bonding

Answer

Metallic bonding

Answer

Hydrogen bonding

Question 41

Which functional group is characterized by a carbonyl group (C=O) bonded to a hydrogen atom?

Accepted Answer

Aldehyde

Answer

Carboxylic acid

Answer

Ketone

Answer

Alcohol

Question 42

What is the IUPAC name of the compound with the molecular formula CH3CH2CH2OH?

Accepted Answer

1-propanol

Answer

Propanoic acid

Answer

Propanone

Answer

Propanal

Question 43

Which of the following hydrocarbons is classified as an alkane?

Accepted Answer

CH3CH2CH3

Answer

CH2CHCH2

Answer

CH3CH=CH2

Answer

CH3C≡CH

Question 44

What is the hybridization state of the carbon atom in methane (CH4)?

Accepted Answer

sp3

Answer

sp2

Answer

sp

Answer

None of the above

Question 45

Which representation depicts the carbon skeleton of an organic molecule in a simplified form?

Accepted Answer

Line-angle formula

Answer

Condensed formula

Answer

Molecular formula

Answer

Lewis structure

Question 46

Which functional group is responsible for the acidic properties of carboxylic acids?

Accepted Answer

-COOH

Answer

-CHO

Answer

-NH2

Answer

-OH

Question 47

What is the general formula for an alkane?

Accepted Answer

CnH2n+2

Answer

CnH2n

Answer

CnH2n+1

Answer

CnH2n-2