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Organic Chemistry – Some Basic Principles and Techniques

JEE Main 2025 (Online) 22nd January Morning ShiftMCQMedium📈 Topic in 16% papers+4−1
Ques. 1JEE Main 2025, 22 January (Morning Shift)

The IUPAC name of the following compound is : [figure]

  1. 5-Methoxycarbonyl-2-methylhexanoic acid
  2. Methyl-5-carboxy-2-methylhexanoate.
  3. 2-Carboxy-5-methoxycarbonylhexane.
  4. Methyl-6-carboxy-2,5-dimethylhexanoate.

Answer

(1) 5-Methoxycarbonyl-2-methylhexanoic acid

Solution

-COOH outranks the ester numbering starts at the COOH carbon: hexanoic acid

[figure]

Prefixes in alphabetical order: methoxycarbonyl (C-5), methyl (C-2)

5-Methoxycarbonyl-2-methylhexanoic acid

Answer: (1)

Keep practising — Organic Chemistry – Some Basic Principles and Techniques

Ques. 2JEE Main 2025, 22 January (Evening Shift)

The most stable carbocation from the following is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 3JEE Main 2025, 22 January (Evening Shift)

The alkane from below having two secondary hydrogens is :

  1. 2,2,4,5-Tetramethylheptane
  2. 2,2,4,4-Tetramethylhexane
  3. 4-Ethyl-3,4-dimethyloctane
  4. 2,2,3,3-Tetramethylpentane

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