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Haloalkanes and Haloarenes

JEE Main 2024 (Online) 6th April Morning ShiftNumericalMedium📈 Topic in 15% papers+4
Ques. 1JEE Main 2024, 6 April (Morning Shift)

The major products from the following reaction sequence are product A and product B. [figure] The total sum of electrons in product A and product B are (nearest integer)

Answer

8

Solution

[figure]

[figure]

A: one –C≡C– (2 π bonds) ⇒ 4 π electrons

B: cyclohexa-1,3-diene, two C=C ⇒ 4 π electrons

∴ total = 4 + 4 = 8

Answer: 8

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Ques. 2JEE Main 2024, 6 April (Evening Shift)

[figure] Consider the above chemical reaction. Product "A" is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 3JEE Main 2024, 5 April (Morning Shift)

The number of halobenzenes from the following that can be prepared by Sandmeyer's reaction is [figure]

Ques. 4JEE Main 2024, 5 April (Evening Shift)

Identify the major product in the following reaction. [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE Main 2024, 4 April (Morning Shift)

[figure] Identify B and C and how are A and C related?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 6JEE Main 2024, 4 April (Morning Shift)

Identify the correct set of reagents or reaction conditions 'X' and 'Y' in the following set of transformation. CH3-CH2-CH2-Br 'X' Product 'Y' CH3- Br |CH-CH3

  1. X = dil.aq. NaOH, 20°C, Y = HBr/ acetic acid
  2. X = conc.alc. NaOH, 80°C, Y = Br2/CHCl3
  3. X = dil.aq. NaOH, 20°C, Y = Br2/CHCl3
  4. X = conc.alc. NaOH, 80°C, Y = HBr/ acetic acid
Ques. 7JEE Main 2024, 4 April (Evening Shift)

[figure] Product P is

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8JEE Main 2024, 4 April (Evening Shift)

Find out the major product formed from the following reaction. [Me : –CH3] [figure]

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

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below :

  1. (A) is correct but (R) is not correct
  2. Both (A) and (R) are correct and (R) is the correct explanation of (A)
  3. (A) is not correct but (R) is correct
  4. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
Ques. 10JEE Main 2024, 1 February (Evening Shift)

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

  1. (A)-(II), (B)-(III), (C)-(I), (D)-(IV)
  2. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
  3. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
  4. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
Ques. 11JEE Main 2024, 31 January (Morning Shift)

The product (C) in the below mentioned reaction is : CH3-CH2-CH2-Br [ ]KOH(alc) A HBr B [KOH(aq)] C

  1. Propan-1-ol
  2. Propyne
  3. Propan-2-ol
  4. Propene

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