PYQSidePowered byPrepblink ExamsMy practice

Organic Chemistry – Some Basic Principles and Techniques

JEE Main 2025 (Online) 24th January Evening ShiftNumericalEasy📈 Topic in 3% papers+4
Ques. 1JEE Main 2025, 24 January (Evening Shift)

The hydrocarbon (X) with molar mass 80 g mol-1 and 90\% carbon has degree of unsaturation.

Answer

3

Solution

C: 7212=6; H: 80-721=8 C6H8

DBE= 2(6)+2-82=3

Answer: 3

Keep practising — Organic Chemistry – Some Basic Principles and Techniques

Ques. 2JEE Main 2025, 23 January (Morning Shift)

The correct stability order of the following species/molecules is : [figure]

  1. q > r > p
  2. q > p > r
  3. p > q > r
  4. r > q > p
Ques. 3JEE 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.
Ques. 4JEE Main 2025, 22 January (Evening Shift)

The most stable carbocation from the following is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE 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

All Organic Chemistry – Some Basic Principles and Techniques PYQs →

PDFDownload Organic Chemistry – Some Basic Principles and Techniques PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All JEE Main Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolutionsElectrochemistryChemical Kinetics
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular Structurep-Block Elements (Group 13 & 14)p-Block Elements (Group 15–18)d- and f-Block ElementsCoordination Compounds
Organic ChemistryOrganic Chemistry – Some Basic Principles and TechniquesIsomerismHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesBiomoleculesPrinciples Related to Practical Chemistry