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Quizzes > Science > Chemistry

Think You Can Name Every Alkane? Take the Quiz

Ready for some alkane nomenclature practice? Dive into our naming alkanes quiz!

Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper cut illustration of naming alkanes practice quiz icons and molecule shapes on sky blue background

Ready to sharpen your organic chemistry skills? Dive into our naming alkanes practice quiz - your go-to resource for mastering alkane nomenclature and acing the naming of alkanes quiz. This friendly naming alkanes quiz guides you through alkane nomenclature practice step by step, testing straight-chain, branched structures, and giving instant feedback on every alkane naming quiz challenge. Whether you're prepping for exams or reinforcing concepts, you'll build confidence and clarity. Then expand your expertise with our organic chemistry nomenclature quiz to tackle anything IUPAC throws at you. Jump in now and conquer alkane naming with confidence!

What is the IUPAC name for CH4?
Methane
Propane
Butane
Ethane
The simplest alkane with one carbon atom is named methane. It follows the IUPAC rule that alkanes with one carbon get the suffix "-ane" on meth-. Learn more about naming alkanes.
What is the correct IUPAC name for C2H6?
Methane
Ethene
Propane
Ethane
An alkane with two carbons is named ethane. The prefix "eth-" indicates two carbons, with "-ane" signifying single bonds only. Further explanation of alkane prefixes.
What is the IUPAC name of C3H8?
Propene
Butane
Propyne
Propane
Propane is the three-carbon alkane with single bonds only. The "prop-" prefix means three carbons and "-ane" indicates all single bonds. Propane naming details.
What is the systematic name for C4H10?
Propane
Butane
Pentane
Butene
Butane has four carbons and only single bonds, giving it the formula C4H10. According to IUPAC the prefix "but-" denotes four carbons with the "-ane" suffix. Butane structure and naming.
What is the IUPAC name for C5H12?
Hexane
Butane
Pentane
Isopentane
Pentane is the straight-chain alkane with five carbons (C5H12). The prefix "pent-" is for five, and "-ane" shows single carbon - carbon bonds. Chain length naming guide.
What is the correct IUPAC name for CH3CH(CH3)CH2CH3?
3-Ethylpropane
2-Ethylpropane
2-Methylbutane
3-Methylbutane
The longest chain has four carbons (butane), and there is a methyl substituent on carbon 2. According to IUPAC rules the correct name is 2-methylbutane. More on 2-methylbutane.
Which is the correct IUPAC name for (CH3)3C - CH3?
2,2-Dimethylpropane
2,2-Dimethylpropane
2,2-Dimethylbutane
2-Methylbutane
The structure is neopentane, which is a three-carbon chain (propane) with two methyl groups on carbon 2. The correct IUPAC name is 2,2-dimethylpropane. Branched alkane naming.
Identify the IUPAC name for CH3CH2CH(CH3)CH2CH2CH3.
4-Methylhexane
3-Methylhexane
5-Methylhexane
2-Methylhexane
The parent chain has six carbons (hexane), and the methyl substituent is on the third carbon if numbered from the end giving the lowest locant. Hence 3-methylhexane is correct. Numbering rules for substituents.
What is the correct IUPAC name for CH3CH(CH3)CH2CH(CH3)CH2CH2CH3?
2,4-Dimethyloctane
2,5-Dimethyloctane
3,4-Dimethyloctane
3,5-Dimethyloctane
The longest chain has eight carbons (octane). Methyl groups are on carbons 3 and 5 when numbered to give the lowest set of locants. Thus the name is 3,5-dimethyloctane. Alkane nomenclature tutorial.
How do you name CH3CH2CH(CH3)CH(CH3)CH2CH3 under IUPAC rules?
2,3-Dimethylhexane
3,4-Dimethylheptane
3,4-Dimethylhexane
2,4-Dimethylheptane
The parent chain has seven carbons (heptane). Methyl substituents are on carbons 3 and 4. Numbering from the nearest end gives locants 3 and 4, so 3,4-dimethylheptane is correct. Examples of dimethylheptane.
What is the IUPAC name for CH3CH2CH(CH2CH3)CH(CH3)CH2CH3?
3-Ethyl-4-methylheptane
2-Ethyl-3-methylhexane
3-Methyl-4-ethylheptane
4-Ethyl-3-methylheptane
Heptane is the longest chain (7 carbons). Ethyl is at C3 and methyl at C4 according to lowest-number rules. Therefore, the correct name is 3-ethyl-4-methylheptane. Ethyl and methyl substituents.
What is the correct IUPAC name for CH3CH(C2H5)C(CH3)2CH2CH3?
3-Ethyl-2,2-dimethylpentane
3,3-Diethyl-2-methylpentane
2-Ethyl-3,3-dimethylpentane
2,3-Diethyl-2-methylbutane
Pentane is the parent chain (5 carbons). There is an ethyl group at C2 and two methyl groups at C3, giving the name 2-ethyl-3,3-dimethylpentane. Complex substituent naming.
Which name follows IUPAC rules for substituent order: ethyl and methyl?
Ethyl before methyl
Methyl before ethyl
Shorter group first
Alphabetical by carbon count
Substituents are listed in alphabetical order regardless of their size. Since "ethyl" comes before "methyl" alphabetically, ethyl is named first. IUPAC substituent ordering rules.
What is the IUPAC name for CH3CH(Cl)CH2CH(CH3)CH3?
2-Methyl-4-chloropentane
4-Methyl-2-chloropentane
2-Chloro-4-methylpentane
3-Methyl-1-chloropentane
Pentane is the parent chain. The chlorine substituent at C2 and methyl at C4 yields the name 4-methyl-2-chloropentane when numbering to give the lowest possible set of locants. Halogen substituent naming.
Which numbering gives the correct name 2,3,4-trimethylhexane with lowest locants?
Locants 2,4,5 from the nearest end
Locants 2,3,4 from the nearest end
Locants 1,2,3 from the nearest end
Locants 3,4,5 from the nearest end
When naming a six-carbon chain with three methyl substituents, numbering from the end that gives locants 2,3,4 is lowest. Therefore the correct numbering produces 2,3,4-trimethylhexane. Numbering rules overview.
What is the IUPAC name for CH3 - C(CH3)2 - CH(CH3) - C(CH3)2 - CH3?
2,2,3,4,4-Pentamethylpentane
3-Methyl-2,2,4,4-tetramethylpentane
2,2,4,4-Tetramethyl-3-methylpentane
2,3,4,4,5-Pentamethylhexane
The parent chain has five carbons (pentane). There are five methyl substituents located at C2 (two), C3 (one), and C4 (two), which collectively give 2,2,3,4,4-pentamethylpentane. IUPAC nomenclature recommendations.
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Study Outcomes

  1. Understand IUPAC Alkane Nomenclature Principles -

    Describe how to determine the longest carbon chain and apply base names in alkane nomenclature practice.

  2. Apply Carbon Chain Numbering Rules -

    Use systematic numbering to assign the lowest possible locants to substituents when naming alkanes.

  3. Identify Alkyl Substituents -

    Recognize and name common branching groups such as methyl, ethyl, and propyl in branched alkanes.

  4. Construct Correct IUPAC Names for Alkanes -

    Build full systematic names for both straight-chain and branched alkanes based on established nomenclature guidelines.

  5. Differentiate Alkane Isomers -

    Compare structural isomers and select the proper name by analyzing variations in carbon skeletons.

  6. Evaluate and Correct Alkane Names -

    Assess naming of alkanes quiz scenarios, identify errors, and refine names to ensure accuracy.

Cheat Sheet

  1. Identify the Longest Chain -

    Locate the continuous path of carbons with the greatest length to decide the parent alkane (e.g., a five-carbon chain yields "pentane"). Sketch all possible pathways - resources like IUPAC's guides recommend coloring the longest chain to avoid mistakes. Precision here sets the foundation for success in your naming alkanes practice.

  2. Number the Chain for Lowest Locants -

    Assign numbers to carbon atoms starting from the end nearest the first substituent so you get the lowest possible set of locants (e.g., 3-methylhexane instead of 4-methylhexane). Recall the "first point of difference" rule used in academic organic chemistry courses to break ties efficiently. Mastering this step will help you excel at any naming alkanes quiz scenario.

  3. Alphabetize Substituents Correctly -

    List substituents in alphabetical order, ignoring multiplicative prefixes like di- and tri- (e.g., "ethyl" precedes "methyl" in 3-ethyl-2-methylpentane). A handy mnemonic is "A B C" to remember that prefixes don't count in alphabetizing. Consistent practice of this rule is critical to passing any alkane nomenclature practice.

  4. Use Multiplicative Prefixes and Punctuation -

    Apply di-, tri-, tetra- for multiple identical substituents and separate numbers with commas and hyphens correctly (e.g., 2,3-dimethylbutane). Refer to chemistry department handouts which stress the importance of clear punctuation to avoid naming ambiguity. Sharpening this skill elevates your performance on naming of alkanes quiz questions.

  5. Name Cycloalkanes and Complex Branching -

    When rings form the parent structure, add "cyclo" (e.g., cyclohexane) and number substituents to achieve the lowest locants (1-methylcyclopentane by default). For bicyclic or polycyclic systems, consult IUPAC rules for prefixes like "bicyclo" to handle bridgehead carbons properly. This approach makes cycloalkane naming a breeze on quizzes and exams.

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