Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 202125 FebruaryEvening Shift
Exam
JEE Main
Year
2021
Date
25 February
Shift
Evening Shift
Subject
Chemistry
Chapter
Hydrocarbons

JEE Main 2021 · 25 February · Evening Shift · Chemistry · Hydrocarbons

The correct sequence of reagents used in the preparation of 4...

The correct sequence of reagents used in the preparation of 44 -bromo-22-nitroethylbenzene from benzene is :The correct sequence of reagents used in the preparation of 4 -bromo- 2 -nitroethylbenzene from benzene is :

Options

  1. ACH3COCl/AlCl3,Br2/AlBr3,HNO3/H2SO4,Zn/HCl{CH}_{3}COCl / {AlCl}_{3}, {Br}_{2} / {AlBr}_{3}, {HNO}_{3} / {H}_{2}{SO}_{4}, Zn / HCl
  2. BCH3COCl/AlCl3,Zn−Hg/HCl,Br2/AlBr3,HNO3/H2SO4{CH}_{3}COCl / {AlCl}_{3}, Zn - Hg / HCl, {Br}_{2} / {AlBr}_{3}, {HNO}_{3} / {H}_{2}{SO}_{4}
  3. CHNO3/H2SO4,Br2/AlCl3,CH3COCl/AlCl3,Zn−Hg/HCl{HNO}_{3} / {H}_{2}{SO}_{4}, {Br}_{2} / {AlCl}_{3}, {CH}_{3}COCl / {AlCl}_{3}, Zn - Hg / HCl
  4. DBr2/AlBr3,CH3COCl/AlCl3,HNO3/H2SO4,Zn/HCl{Br}_{2} / {AlBr}_{3}, {CH}_{3}COCl / {AlCl}_{3}, {HNO}_{3} / {H}_{2}{SO}_{4}, Zn / HCl

Correct answer

B. CH3COCl/AlCl3,Zn−Hg/HCl,Br2/AlBr3,HNO3/H2SO4{CH}_{3}COCl / {AlCl}_{3}, Zn - Hg / HCl, {Br}_{2} / {AlBr}_{3}, {HNO}_{3} / {H}_{2}{SO}_{4}

Step-by-step solution

Benzene is an aromatic compound which shows the characteristic reaction of electrophilic aromatic substitution reactions. This is because the reaction is initiated by an electrophile.

Benzene reacts with CH3​Cl in presence of anhydrous AlCl3​ to give Toulene. This is fridel crafts Alkylation and an electrophillic substitution.

The correct sequence of reagents used in the preparation of 4 -bromo- 2 -nitroethylbenzene from benzene is :

Practice Hydrocarbons on Quantrex Academy →

More from Hydrocarbons

In the following reaction sequence, Q , R , S and T are the major products. The correct… JEE Advanced 2026Treatment of buta-1,3-diyne with NaNH_2 ( 2 equivalents), followed by reaction with… JEE Advanced 2026The List-II contains products obtained from the reaction of compounds in List-I with O_3… JEE Advanced 2026Natural rubber on complete ozonolysis ( O_3 /Zn- H_2O ) gives compound X as the major… JEE Advanced 2026An optically active alkyl bromide C _4 H _9 Br, reacts with ethanolic KOH to form major… JEE Main 2026An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with… JEE Main 2026R_f value for 2 -methylpropene in a solvent system (Ethyl acetate + ether) is 0.42 . 2… JEE Main 2026Given below are two statements: Statement I: Methane can be prepared by decarboxylation… JEE Main 2026 Full Hydrocarbons list All JEE Main PYQs