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Organic Chemistry - Some Basic Principles and Techniques appeared 2 times across 1 year — 4.4% of Chemistry. This question is from IUPAC Nomenclature of Alkanes.

Year 2024 Total
Questions 2 2
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The correct IUPAC name of the following compound is: CH₃-CH₂-CH(CH₂CH₃)-CH₂-CH(CH₃)-CH₂-CH₃

Solution & Explanation

Related Formula
IUPAC Rule: Longest chain select arrow Lowest locant set arrow Alphabetical substituent order
Core Logic

Longest continuous carbon chain contains 7 carbons (heptane). Numbering from left gives locants 3 (ethyl) and 5 (methyl). Alphabetical order: ethyl comes before methyl.

Step 1: Conclusion

IUPAC Name: 3-ethyl-5-methylheptane.

Pattern Recognition

Chain length is 7 (heptane), not 6 (hexane). Apply lowest locants + alphabetical prefix ordering.

Chapter Mix

Class 11 Chemistry: Organic Chemistry - Some Basic Principles and Techniques

Numbered parent chain diagram for Q81
Numbered parent chain diagram for Q81

Reference Study Guides

Organic Chemistry Some Basic Principles And Techniques

More Organic Chemistry - Some Basic Principles and Techniques Previous-Year Questions

Q66 neet_2024_05_may_morning Isomerism - Metamerism
The pair of molecules that are metamers among the following is:
  • A. (1) CH₃CH₂CH₂OH and CH₃-CH(OH)-CH₃
  • B. (2) CH₃OCH₂CH₂CH₃ and CH₃CH₂OCH₂CH₃
  • C. (3)
    Isomerism - Metamerism
    Isomerism - Metamerism
  • D. (4) CH₃CH₂CH₂CH₂CH₃ and (CH₃)₂CHCH₂CH₃

Solution

Related Formula
Metamers arrow Different alkyl chains attached to polyvalent functional group
Core Logic

CH₃-O-CH₂CH₂CH₃ (methyl propyl ether) and CH₃CH₂-O-CH₂CH₃ (diethyl ether) have different alkyl groups attached on either side of the ether oxygen atom.

Step 1: Conclusion

Pair (2) represents metamers.

Pattern Recognition

Check polyvalent heteroatom (O, S, NH): unequal carbon distribution across functional group indicates metamerism.

Chapter Mix

Class 11 Chemistry: Organic Chemistry - Some Basic Principles and Techniques

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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)