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Haloalkanes and Haloarenes · Question 20

JEE Main 2025 (Online) 2nd April Evening ShiftMatchingEasy📈 Topic in 16% papers+4−1
1

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

  1. (A)-(III), (B)-(II), (C)-(IV), (D)-(I)
  2. (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
  3. (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
  4. (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

Answer

(4) (A)-(III), (B)-(IV), (C)-(II), (D)-(I)

Solution

(A) Two molecules of an aryl halide couple with sodium in dry ether to give biphenyl: Fittig reaction (III).

(B) A diazonium salt warmed with Cu powder and HCl gives the aryl chloride: Gattermann reaction (IV).

(C) Halogen exchange of an alkyl bromide with NaI in dry acetone (NaBr precipitates and drives the reaction forward): Finkelstein reaction (II).

(D) A 3° alcohol reacts at once with conc. HCl/anhydrous ZnCl2 (Lucas reagent) to give the 3° alkyl chloride: Lucas reaction (I).

(A)-(III), (B)-(IV), (C)-(II), (D)-(I)

Answer: (4)

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2

[figure] Consider the above sequence of reactions. 151 g of 2-bromopentane is made to react. Yield of major product P is 80\% whereas Q is 100\%. Mass of product Q obtained is g. (Given molar mass in g mol-1 H : 1, C : 12, O : 16, Br : 80)

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3

In the following substitution reaction : [figure] Product 'P' formed is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
JEE Main 2025 (Online) 29th January Morning Shift
4

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
JEE Main 2025 (Online) 28th January Morning Shift
5

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
JEE Main 2025 (Online) 28th January Morning Shift
6

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
JEE Main 2025 (Online) 28th January Evening Shift
7

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
JEE Main 2025 (Online) 28th January Evening Shift

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