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Haloalkanes and Haloarenes

JEE Main 2025 (Online) 29th January Evening ShiftMCQMedium📈 Topic in 24% papers+4−1
Ques. 1JEE Main 2025, 29 January (Evening Shift)

Which among the following halides will generate the most stable carbocation in the nucleophilic substitution reaction?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]

Answer

(2) [figure]

Solution

SN1 rate stability of the carbocation (resonance).

[figure]

Ph3C : charge delocalised over 3 rings (9 o/p positions) – more than benzyl (3), allyl (2), cyclohexenyl (2).

Answer: (2)

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Ques. 2JEE Main 2025, 28 January (Morning Shift)

The products A and B in the following reactions, respectively are A AgNO2 CH3-CH2-CH2-Br AgCN B

  1. CH3-CH2-CH2-ONO, CH3-CH2-CH2-CN
  2. CH3-CH2-CH2-NO2, CH3-CH2-CH2-CN
  3. CH3-CH2-CH2-ONO, CH3-CH2-CH2-NC
  4. CH3-CH2-CH2-NO2, CH3-CH2-CH2-NC
Ques. 3JEE Main 2025, 28 January (Morning Shift)

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

  1. Both Statement I and Statement II are correct
  2. Statement I is incorrect but Statement II is correct
  3. Both Statement I and Statement II are incorrect
  4. Statement I is correct but Statement II is incorrect
Ques. 4JEE Main 2025, 28 January (Evening Shift)

The product B formed in the following reaction sequence is: [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE Main 2025, 28 January (Evening Shift)

The major product of the following reaction is: [figure]

  1. 6-Phenylhepta-3,5-diene
  2. 6-Phenylhepta-2,4-diene
  3. 2-Phenylhepta-2,4-diene
  4. 2-Phenylhepta-2,5-diene
Ques. 6JEE Main 2025, 24 January (Morning Shift)

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 false
  4. Both Statement I and Statement II are true
Ques. 7JEE Main 2025, 24 January (Evening Shift)

The structure of the major product formed in the following reaction is : [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8JEE Main 2025, 23 January (Morning Shift)

Match the 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-II, B-I, C-III, D-IV
  3. A-IV, B-I, C-III, D-II
  4. A-IV, B-III, C-I, D-II
Ques. 9JEE Main 2025, 23 January (Evening Shift)

The ascending order of relative rate of solvolysis of following compounds is : [figure]

  1. (C) < (D) < (B) < (A)
  2. (D) < (A) < (B) < (C)
  3. (D) < (B) < (A) < (C)
  4. (C) < (B) < (A) < (D)
Ques. 10JEE Main 2025, 22 January (Morning Shift)

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

  1. Both Statement I and Statement II are incorrect
  2. Both Statement I and Statement II are correct
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
Ques. 11JEE Main 2025, 22 January (Evening Shift)

[figure] The maximum number of RBr producing 2-methylbutane by above sequence of reactions is . (Consider the structural isomers only)

  1. 5
  2. 3
  3. 4
  4. 1

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