PYQSide ExamsMy practice

Organic Chemistry – Some Basic Principles and Techniques · Question 19

JEE Main 2026 (Online) 23rd January Evening ShiftMCQEasy📈 Topic in 10% papers+4−1
1

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below

  1. Statement I is false but Statement II is true
  2. Statement I is true but Statement II is false
  3. Both Statement I and Statement II are true
  4. Both Statement I and Statement II are false

Answer

(2) Statement I is true but Statement II is false

Solution

Number of hyperconjugation interactions = number of α-H atoms (C–H bonds on carbons attached to the positive carbon).

(CH3)3 C: three CH3 groups 9 α-H 9 hyperconjugation interactions more stable. Statement I is true.

CH3: the three H atoms are on the positive carbon itself; there is no α-carbon no hyperconjugation is possible (0, not 3). Statement II is false.

Answer: (2)

JEE Main 2026 (Online) 23rd January Evening Shift

Keep practising — Organic Chemistry – Some Basic Principles and Techniques

2

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

  1. 2-bromo-5-methylhexylpropanoate
  2. n-propyl-1-bromo-4-methylhexanoate
  3. n-propyl-2-bromo-5-methylheptanoate
  4. 2-bromo-5-methylpropanoate
JEE Main 2026 (Online) 22nd January Evening Shift
3

From the following, the least stable structure is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
JEE Main 2026 (Online) 21st January Morning Shift
4

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

  1. A-IV, B-II, C-III, D-I
  2. A-II, B-III, C-I, D-IV
  3. A-III, B-IV, C-I, D-II
  4. A-III, B-IV, C-II, D-I
JEE Main 2025 (Online) 8th April Evening Shift
5

What is the correct IUPAC name of the compound? [figure]

  1. 1-Ethylcyclopent-2-en-3-ol
  2. 4-Ethylcyclopent-2-en-1-ol
  3. 1-Ethyl-3-hydroxycyclopent-2-ene
  4. 4-Ethyl-1-hydroxycyclopent-2-ene
JEE Main 2025 (Online) 8th April Evening Shift
6

Which of the following is the correct IUPAC name of given organic compound (X)? [figure]

  1. 4-Bromo-3-methylbut-2-ene
  2. 1-Bromo-2-methylbut-2-ene
  3. 3-Bromo-3-methylprop-2-ene
  4. 2-Bromo-2-methylbut-2-ene
JEE Main 2025 (Online) 7th April Morning Shift
7

Given below are two statements. In the light of the above statements, choose the correct answer from the options given below:

  1. Both Statement I and Statement II are true
  2. Statement I is true but Statement II is false
  3. Statement I is false but Statement II is true
  4. Both Statement I and Statement II are false
JEE Main 2025 (Online) 4th April Morning Shift
8

The IUPAC name of the following compound is: HC C-CH2- OH |CH-CH2-CH=CH2

  1. 4-Hydroxyhept-6-en-1-yne
  2. Hept-1-en-6-yn-4-ol
  3. Hept-6-en-1-yn-4-ol
  4. 4-Hydroxyhept-1-en-6-yne
JEE Main 2025 (Online) 4th April Evening Shift
9

In which pairs, the first ion is more stable than the second?

  1. (A) & (B) only
  2. (B) & (D) only
  3. (A) & (C) only
  4. (B) & (C) only
JEE Main 2025 (Online) 4th April Evening Shift
10

The correct order of basicity for the following molecules is : [figure]

  1. R > P > Q
  2. P > Q > R
  3. R > Q > P
  4. Q > P > R
JEE Main 2025 (Online) 4th April Evening Shift
11

The least acidic compound, among the following is: [figure]

  1. B
  2. D
  3. A
  4. C
JEE Main 2025 (Online) 3rd April Morning Shift

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