PYQSidePowered byPrepblink ExamsMy practice

Organic Chemistry – Some Basic Principles and Techniques

JEE Main 2024 (Online) 8th April Evening ShiftMCQEasy📈 Topic in 5% papers+4−1
Ques. 1JEE Main 2024, 8 April (Evening Shift)

IUPAC name of following hydrocarbon(X) is : CH3- CH3 |CH-CH2- (X)CH2- CH3 |CH- CH3 |CH-CH2-CH3

  1. 2,5,6-Trimethyloctane
  2. 2-Ethyl-2,6-diethylheptane
  3. 3,4,7-Trimethyloctane
  4. 2-Ethyl-3,6-dimethylheptane

Answer

(1) 2,5,6-Trimethyloctane

Solution

The longest chain has 8 C (octane) with three CH3 branches:

1CH3- CH3 | 2CH- 3CH2- 4CH2- CH3 | 5CH- CH3 | 6CH- 7CH2- 8CH3

Numbering from the left gives locants 2, 5, 6; from the right 3, 4, 7.

Since the first point of difference decides (2 < 3), the chain is numbered from the left: 2,5,6-Trimethyloctane.

Answer: (1)

Keep practising — Organic Chemistry – Some Basic Principles and Techniques

Ques. 2JEE Main 2024, 8 April (Evening Shift)

Total number of aromatic compounds among the following compounds is . [figure]

Ques. 3JEE Main 2024, 6 April (Morning Shift)

Functional group present in sulphonic acids is :

  1. -SO2
  2. [figure]
  3. -SO3H
  4. -SO4H
Ques. 4JEE Main 2024, 6 April (Evening Shift)

[figure] The correct arrangement for decreasing order of electrophilic substitution for above compounds is :

  1. (III) > (IV) > (II) > (I)
  2. (III) > (I) > (II) > (IV)
  3. (II) > (IV) > (III) > (I)
  4. (IV) > (I) > (II) > (III)
Ques. 5JEE Main 2024, 6 April (Evening Shift)

Number of carbocations from the following that are not stabilized by hyperconjugation is . [figure]

Ques. 6JEE Main 2024, 5 April (Morning Shift)

Number of and bonds present in ethylene molecule is respectively :

  1. 3 and 1
  2. 5 and 1
  3. 4 and 1
  4. 5 and 2
Ques. 7JEE Main 2024, 5 April (Evening Shift)

The correct nomenclature for the following compound is : [figure]

  1. 2-carboxy-4-hydroxyhept-7-enal
  2. 2-formyl-4-hydroxyhept-7-enoic acid
  3. 2-carboxy-4-hydroxyhept-6-enal
  4. 2-formyl-4-hydroxyhept-6-enoic acid
Ques. 8JEE Main 2024, 4 April (Morning Shift)

What will be the decreasing order of basic strength of the following conjugate bases? -OH, R O, CH3CO O, C l

  1. C l > R O > -OH > CH3CO O
  2. -OH > R O > CH3CO O > C l
  3. C l > -OH > R O > CH3CO O
  4. R O > -OH > CH3CO O > C l
Ques. 9JEE Main 2024, 4 April (Morning Shift)

Match List I with List II : Choose the correct answer from the options given below :

  1. (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
  2. (A) - (II), (B) - (IV), (C) - (III), (D) - (I)
  3. (A) - (III), (B) - (I), (C) - (II), (D) - (IV)
  4. (A) - (IV), (B) - (III), (C) - (I), (D) - (II)
Ques. 10JEE Main 2024, 4 April (Morning Shift)

Which among the following is incorrect statement?

  1. The electromeric effect is a temporary effect
  2. Hydrogen ion (H+) shows negative electromeric effect
  3. The organic compound shows electromeric effect in the presence of the reagent only.
  4. Electromeric effect dominates over inductive effect
Ques. 11JEE Main 2024, 4 April (Evening Shift)

Correct order of stability of carbanions is : [figure]

  1. d > c > b > a
  2. c > b > d > a
  3. d > a > c > b
  4. a > b > c > d

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 ReactionsSolid StateSolutionsElectrochemistryChemical Kinetics
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular Structures-Block Elementsp-Block Elements (Group 13 & 14)Environmental ChemistryGeneral Principles of Isolation of Elementsp-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