About this Study Set
This study set covers Organic Chemistry through
25 practice questions.
An introductory exploration of organic chemistry, focusing on carbon, hydrocarbons, and functional groups. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 25 questions from the
Organic Chemistry Fundamentals study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which element is the primary backbone of all organic compounds?
-
A
Oxygen
-
B
Carbon
-
C
Nitrogen
-
D
Hydrogen
2
What is the simplest alkane hydrocarbon?
-
A
Ethane
-
B
Propane
-
C
Methane
-
D
Butane
3
Which chemical formula represents the functional group of an alcohol?
-
A
-OH
-
B
-COOH
-
C
-NH2
-
D
-CHO
4
How many bonds does a neutral carbon atom typically form in stable organic molecules?
-
A
Two
-
B
Three
-
C
Four
-
D
Five
5
What is the general term for compounds that contain only carbon and hydrogen?
-
A
Polymers
-
B
Hydrocarbons
-
C
Isomers
-
D
Carbohydrates
6
Which state of matter is typically associated with short-chain alkanes like methane at room temperature?
-
A
Solid
-
B
Liquid
-
C
Gas
-
D
Plasma
7
Which type of bond involves the sharing of electron pairs between carbon atoms?
-
A
Ionic
-
B
Covalent
-
C
Metallic
-
D
Hydrogen
8
Which common organic acid is found in vinegar?
-
A
Citric acid
-
B
Acetic acid
-
C
Sulfuric acid
-
D
Lactic acid
9
What prefix is used to indicate a hydrocarbon chain with three carbon atoms?
-
A
Meth-
-
B
Eth-
-
C
Prop-
-
D
But-
10
Which element, besides carbon, is present in every hydrocarbon?
-
A
Oxygen
-
B
Nitrogen
-
C
Sulfur
-
D
Hydrogen
11
What is the name of the process used to separate components of crude oil based on boiling points?
-
A
Distillation
-
B
Filtration
-
C
Sublimation
-
D
Centrifugation
12
Which of these is considered an organic compound?
-
A
Sodium chloride
-
B
Calcium carbonate
-
C
Glucose
-
D
Water
13
Which functional group is characterized by a carbon atom double-bonded to an oxygen atom?
-
A
Hydroxyl
-
B
Carbonyl
-
C
Amino
-
D
Halide
14
What is the chemical formula for ethene?
-
A
C2H6
-
B
C2H4
-
C
C2H2
-
D
CH4
15
What is the shape of a methane molecule (CH4)?
-
A
Linear
-
B
Tetrahedral
-
C
Planar
-
D
Octahedral
16
Which class of hydrocarbons contains at least one carbon-carbon triple bond?
-
A
Alkanes
-
B
Alkenes
-
C
Alkynes
-
D
Arenes
17
What is the fundamental building block of proteins?
-
A
Fatty acids
-
B
Amino acids
-
C
Monosaccharides
-
D
Nucleotides
18
Which organic substance is the primary component of natural gas?
-
A
Propane
-
B
Butane
-
C
Methane
-
D
Ethane
19
In organic chemistry, what does the suffix '-ene' denote?
-
A
A single bond
-
B
A double bond
-
C
A triple bond
-
D
A cyclic structure
20
What are molecules with the same molecular formula but different structural arrangements called?
-
A
Isotopes
-
B
Allotropes
-
C
Isomers
-
D
Homologs
21
Which element is often bonded to carbon in functional groups found in proteins?
-
A
Neon
-
B
Nitrogen
-
C
Helium
-
D
Argon
22
What is the most abundant organic compound on Earth, found in plant cell walls?
-
A
Starch
-
B
Glycogen
-
C
Cellulose
-
D
Chitin
23
What type of organic reaction involves the replacement of one atom or group by another?
-
A
Substitution
-
B
Addition
-
C
Elimination
-
D
Combustion
24
Which term describes long chains of repeating organic units?
-
A
Monomers
-
B
Polymers
-
C
Isomers
-
D
Crystals
25
What is the IUPAC name for the alcohol with two carbon atoms?
-
A
Methanol
-
B
Ethanol
-
C
Propanol
-
D
Butanol
