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Haloalkanes and Haloarenes

JEE Main 2024 (Online) 1st February Morning ShiftMCQEasy📈 Topic in 31% papers+4−1
Ques. 1JEE 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)

Answer

(1) (A) is correct but (R) is not correct

Solution

KCN (ionic) gives free -:C N: (ambident); attack through C (C–C bond stronger)

⇒ R-X + KCN R-CN (alkyl cyanide)

AgCN is mainly covalent (Ag–C bond) ⇒ only the lone pair on N is free to attack

⇒ R-X + AgCN R-NC (isocyanide) ⇒ A is correct

R calls AgCN ionic ⇒ R is not correct

Answer: (1)

Keep practising — Haloalkanes and Haloarenes

Ques. 2JEE 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. 3JEE 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
Ques. 4JEE Main 2024, 31 January (Morning Shift)

[figure] The total number of hydrogen atoms in product A and product B is .

Ques. 5JEE Main 2024, 31 January (Evening Shift)

Identify structure of 2,3-dibromo-1-phenylpentane.

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 6JEE Main 2024, 31 January (Evening Shift)

Identify A and B in the following reaction sequence. [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 7JEE Main 2024, 30 January (Morning Shift)

Example of vinylic halide is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8JEE Main 2024, 30 January (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 true but (R) is false
  2. (A) is false but (R) is true
  3. Both (A) and (R) are true but (R) is not the correct explanation of (A)
  4. Both (A) and (R) are true and (R) is the correct explanation of (A)
Ques. 9JEE Main 2024, 30 January (Evening Shift)

Given below are two statements: In the light of the above statements, choose the most appropriate 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. Both Statement I and Statement II are false.
  4. Statement I is false but Statement II is true.
Ques. 10JEE Main 2024, 29 January (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 from the options given below :

  1. A is true but R is false
  2. Both A and R are true but R is NOT the correct explanation of A
  3. A is false but R is true
  4. Both A and R are true and R is the correct explanation of A
Ques. 11JEE Main 2024, 29 January (Evening Shift)

Alkyl halide is converted into alkyl isocyanide by reaction with

  1. KCN
  2. NH4CN
  3. NaCN
  4. AgCN

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