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Haloalkanes and Haloarenes

JEE Main 2025 (Online) 28th January Morning ShiftMCQEasy📈 Topic in 31% papers+4−1
Ques. 1JEE 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

Answer

(4) CH3-CH2-CH2-NO2, CH3-CH2-CH2-NC

Solution

AgNO2 and AgCN are mainly covalent, so the attack takes place through the atom that carries the free lone pair, not through the negatively charged atom of the free ion.

In Ag–O–N=O the lone pair on nitrogen attacks nitroalkane is formed:

CH3CH2CH2Br + AgNO2 CH3CH2CH2NO2 (A) + AgBr

In Ag–C≡N the lone pair on nitrogen attacks isocyanide is formed:

CH3CH2CH2Br + AgCN CH3CH2CH2NC (B) + AgBr

(KCN and KNO2, being ionic, would give the nitrile and the alkyl nitrite instead.)

Answer: (4)

Keep practising — Haloalkanes and Haloarenes

Ques. 2JEE 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. 3JEE 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. 4JEE 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. 5JEE 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. 6JEE 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. 7JEE 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. 8JEE 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. 9JEE 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. 10JEE 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
Ques. 11JEE Main 2024, 9 April (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. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
  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. (A) is correct but (R) is not correct

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