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Haloalkanes and Haloarenes

RE-NEET (UG) 2024MCQEasy📈 Topic in 25% papers+4−1
Ques. 1RE-NEET (UG) 2024

The major product C in the below mentioned reaction is: CH3CH2CH2Br [ ]alc. KOH A HBr B [ ]aq. KOH C

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

Answer

(2) Propan-2-ol

Solution

CH3CH2CH2Br [ ]alc. KOH CH3CH=CH2 (A, dehydrohalogenation)

CH3CH=CH2 HBr CH3CHBrCH3 (B, Markovnikov addition)

CH3CHBrCH3 [ ]aq. KOH CH3CH(OH)CH3 (C, substitution)

C = propan-2-ol.

Answer: (2)

Keep practising — Haloalkanes and Haloarenes

Ques. 2RE-NEET (UG) 2024

The following reaction method [figure] is not suitable for the preparation of the corresponding haloarene products, due to high reactivity of halogen, when X is :

  1. F
  2. I
  3. Cl
  4. Br
Ques. 3NEET (UG) 2023

The given compound [figure] is an example of .

  1. aryl halide
  2. allylic halide
  3. vinylic halide
  4. benzylic halide
Ques. 4NEET (UG) 2023

Identify the final product [D] obtained in the following sequence of reactions. [figure]

  1. [figure]
  2. C4H10
  3. HC C Na
  4. [figure]
Ques. 5NEET (UG) 2022

Which of the following sequence of reactions is suitable to synthesize chlorobenzene?

  1. Benzene, Cl2, anhydrous FeCl3
  2. Phenol, NaNO2, HCl, CuCl
  3. [figure] , HCl
  4. [figure] , HCl, Heating
Ques. 6NEET (UG) 2022 (Phase 2)

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 not correct but (R) is correct
  2. Both (A) and (R) are correct and (R) is the correct explanation of (A)
  3. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
  4. (A) is correct but (R) is not correct
Ques. 7NEET (UG) 2022 (Phase 2)

Predict the order of reactivity of the following four isomers towards SN2 reaction. (I) CH3CH2CH2CH2Cl (II) CH3CH2CH(Cl)CH3 (III) (CH3)2CHCH2Cl (IV) (CH3)3CCl

  1. (IV) > (II) > (III) > (I)
  2. (IV) > (III) > (II) > (I)
  3. (I) > (II) > (III) > (IV)
  4. (I) > (III) > (II) > (IV)
Ques. 8NEET (UG) 2021

The major product formed in dehydrohalogenation reaction of 2-bromopentane is pent-2-ene. This product formation is based on?

  1. Hückel's Rule
  2. Saytzeff's Rule
  3. Hund's Rule
  4. Hofmann Rule
Ques. 9NEET (UG) 2021

The correct sequence of bond enthalpy of 'C-X' bond is :

  1. CH3-Cl > CH3-F > CH3-Br > CH3-I
  2. CH3-F < CH3-Cl < CH3-Br < CH3-I
  3. CH3-F > CH3-Cl > CH3-Br > CH3-I
  4. CH3-F < CH3-Cl > CH3-Br > CH3-I
Ques. 10NEET (UG) 2020

Elimination reaction of 2-Bromopentane to form pent-2-ene is :

  1. A, C and D only
  2. B, C and D only
  3. A, B and D only
  4. A, B and C only
Ques. 11NEET 2018

The compound C7H8 undergoes the following reactions : C7H8 3Cl2/ A Br2/Fe B Zn/HCl C The product 'C' is

  1. m-bromotoluene
  2. o-bromotoluene
  3. 3-bromo-2,4,6-trichlorotoluene
  4. p-bromotoluene

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