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Organic Chemistry – Some Basic Principles and Techniques

JEE Main 2024 (Online) 29th January Morning ShiftMCQEasy📈 Topic in 17% papers+4−1
Ques. 1JEE Main 2024, 29 January (Morning Shift)

The difference in energy between the actual structure and the lowest energy resonance structure for a given compound is

  1. electromeric energy
  2. resonance energy
  3. ionization energy
  4. hyperconjugation energy

Answer

(2) resonance energy

Solution

Resonance energy = E(most stable contributing structure) − E(actual resonance hybrid)

∵ The hybrid is lower in energy than any single canonical structure; this extra stability is called resonance energy.

Answer: (2)

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Ques. 2JEE Main 2024, 29 January (Morning Shift)

The interaction between bond and lone pair of electrons present on an adjacent atom is responsible for

  1. Resonance effect
  2. Electromeric effect
  3. Hyperconjugation
  4. Inductive effect
Ques. 3JEE Main 2024, 29 January (Morning Shift)

Number of compounds among the following which contain sulphur as heteroatom is . Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine

Ques. 4JEE Main 2024, 29 January (Evening Shift)

According to IUPAC system, the compound [figure] is named as

  1. Cyclohex-2-en-1-ol
  2. 1-Hydroxyhex-2-ene
  3. Cyclohex-1-en-3-ol
  4. Cyclohex-1-en-2-ol
Ques. 5JEE Main 2024, 29 January (Evening Shift)

The ascending acidity order of the following H atoms is [figure]

  1. A < B < D < C
  2. A < B < C < D
  3. D < C < B < A
  4. C < D < B < A
Ques. 6JEE Main 2024, 29 January (Evening Shift)

The total number of 'Sigma' and 'Pi' bonds in 2-formylhex-4-enoic acid is .

Ques. 7JEE Main 2024, 27 January (Morning Shift)

Which of the following is strongest Bronsted base?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8JEE Main 2024, 27 January (Morning Shift)

Which of the following has highly acidic hydrogen?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9JEE Main 2024, 27 January (Morning Shift)

Cyclohexene [figure] is type of an organic compound.

  1. Benzenoid aromatic
  2. Benzenoid non-aromatic
  3. Acyclic
  4. Alicyclic
Ques. 10JEE Main 2024, 27 January (Morning Shift)

IUPAC name of following compound (P) is: [figure]

  1. 1-Ethyl-5,5-dimethylcyclohexane
  2. 3-Ethyl-1,1-dimethylcyclohexane
  3. 1-Ethyl-3,3-dimethylcyclohexane
  4. 1,1-Dimethyl-3-ethylcyclohexane
Ques. 11JEE Main 2024, 27 January (Morning Shift)

Among the given organic compounds, the total number of aromatic compounds is [figure]

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