Haloalkanes and Haloarenes · Chemistry · COMEDK

Start Practice

MCQ (Single Correct Answer)

1

Identify the final product $[Z]$ formed when Chlorobenzene undergoes the given series of reactions:

COMEDK 2025 Morning Shift
2
Which one of the following is a true statement with reference to reaction between 2- Bromo-2-methylpropane and aqueous KOH ?
COMEDK 2025 Morning Shift
3
Which of the following haloalkanes will give more than one isomeric product, on being heated with alc. KOH ?
COMEDK 2025 Morning Shift
4

Both reactions (i) and (ii) give the same compound X as the major product. Identify X

(i). 3-Methylbut-1-ene $+\mathrm{HCl} \rightarrow \mathrm{X}$

(ii). Neopentyl alcohol $+\mathrm{HCl}\left(\right.$ anh. $\left.\mathrm{ZnCl}_2\right) \rightarrow \mathrm{X}$

COMEDK 2025 Morning Shift
5

Identify the compound which gives an optically active haloalkane on reaction with $\mathrm{H}_2$ / Ni on heating.

A B C D

COMEDK 2025 Morning Shift
6

Identify the final product formed when Toluene undergoes a series of reactions with reagents given in the order:

(i) $$\mathrm{Cl}_2$$ / Sunlight

(ii) $$\mathrm{H}_2 \mathrm{O} / 373 \mathrm{~K}$$

(iii) Acetophenone / $$\mathrm{OH^-}$$ at $$293 \mathrm{~K}$$

COMEDK 2024 Evening Shift
7

Arrange the following compounds in the increasing order of their reactivity when each of them is reacted with chloroethane / anhydrous AlCl$$_3$$.

COMEDK 2024 Evening Shift Chemistry - Haloalkanes and Haloarenes Question 1 English

COMEDK 2024 Evening Shift
8

Match the names of reactions given in Column I with the appropriate reactions given in Column II.

No. Name of reaction No. Equations representing reactions
(A) Sandmeyer (P) $$
2 \mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl}+\mathrm{Na} \text { (dry ether) } \rightarrow \text { Diphenyl. }
$$
(B) Fittig (Q) $$
\mathrm{CH}_3-\mathrm{CHBr}-\mathrm{CH}_3+\mathrm{AgF} \rightarrow \mathrm{CH}_3-\mathrm{CHF}-\mathrm{CH}_3+\mathrm{AgBr}
$$
(C) Swarts (R) $$
\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{Br}+\mathrm{Nal} \text { ( Acetone) } \rightarrow \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{I}+\mathrm{NaBr}
$$
(D) Finkelstein (S) $$
\mathrm{C}_6 \mathrm{H}_5 \mathrm{~N}_2+\mathrm{Cl}-+\mathrm{Cu}_2 \mathrm{Br}_2 / \mathrm{HBr} \rightarrow \mathrm{C}_6 \mathrm{H}_5 \mathrm{Br}+\mathrm{N}_2
$$

COMEDK 2024 Evening Shift
9

Arrange the compounds $$\mathrm{A}, \mathrm{B}, \mathrm{C}$$ and $$\mathrm{D}$$ in the increasing order of their reactivity towards $$\mathrm{S_N}1$$ reaction.

$$ \begin{aligned} & \mathrm{A}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Cl} \\ & \mathrm{B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl} \\ & \mathrm{C}=\mathrm{CH}_2=\mathrm{CH}-\mathrm{Cl} \\ & \mathrm{D}=\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{Cl} \end{aligned}$$

COMEDK 2024 Evening Shift
10

Identify the products C, D and F formed in the following sets of reactions.

COMEDK 2024 Evening Shift Chemistry - Haloalkanes and Haloarenes Question 2 English

COMEDK 2024 Evening Shift
11

Arrange the following compounds in the decreasing order of reactivity towards electrophilic substitution reaction.

(I) Chlorobenzene

(II) Nitrobenzene

(III) Benzene

(IV) Isopropylbenzene

COMEDK 2024 Afternoon Shift
12

Arrange the following in the order of increasing reactivity towards $$\mathrm{SN}_{\mathrm{2}}$$ reactions.

$$\begin{array}{ll} \left(\mathrm{CH}_3\right)_3 \mathrm{CCH}_2 \mathrm{Br}(\mathrm{P}) ; & \\\mathrm{CH}_3\left(\mathrm{CH}_2\right)_3 \mathrm{Br}(\mathrm{Q}) ; &\\ \mathrm{CH}_3 \mathrm{CH}_2-\mathrm{CH}\left(\mathrm{CH}_3\right)-\mathrm{CH}_2 \mathrm{Br}(\mathrm{R}) ; & \\\left(\mathrm{CH}_3\right)_2 \mathrm{CHCH}_2 \mathrm{CH}_2 \mathrm{Br}(\mathrm{S}) \end{array}$$

COMEDK 2024 Afternoon Shift
13

Choose the incorrect statement from the following.

COMEDK 2024 Afternoon Shift
14

Consider the following reaction

$$(\mathrm{CH}_3)_2 \mathrm{CHCH}_2 \mathrm{Br}+(\mathrm{CH}_3)_3 \mathrm{CCH}_2 \mathrm{Br} \xrightarrow[\Delta]{\mathrm{Na} \text { /dry ether }} \mathrm{X}+\mathrm{Y}+\mathrm{Z}$$

Identify the product which is not formed?

COMEDK 2024 Afternoon Shift
15

The major product obtained in the following reaction is :

COMEDK 2024 Afternoon Shift Chemistry - Haloalkanes and Haloarenes Question 6 English

COMEDK 2024 Afternoon Shift
16

Which one of the following compounds when reacted with $$\mathrm{NaOH}$$ (aq) undergoes Substitution Nucleophilic Bimolecular reaction with retention of configuration?

COMEDK 2024 Morning Shift
17

$$t$$-butyl chloride preferably undergo hydrolysis by

COMEDK 2023 Morning Shift
18

In Friedal-Crafts alkylation reaction of phenol with chloromethane, the product formed will be

COMEDK 2023 Morning Shift
19

COMEDK 2023 Morning Shift Chemistry - Haloalkanes and Haloarenes Question 17 English

Identify A, B and C.

COMEDK 2023 Morning Shift
20

Identify the compounds A, B, C and D.

$$ \text { 1,2,2,2-tetrachloroethane } \xrightarrow[\Delta]{\mathrm{Zn}}[\mathrm{A}] $$

[A] $$ \xrightarrow[675 \mathrm{~K}]{\text { Fe tube }} $$ [B] $$ \xrightarrow[\text { Conc. } \mathrm{H}_2 \mathrm{SO}_4]{\text { Conc. } \mathrm{HNO}_3} $$ [C] $$ \xrightarrow[\text { Anhydrous } \mathrm{AlCl}_3]{\mathrm{Cl} /}$$ [D]

COMEDK 2023 Evening Shift
21

The reactions taking place with $$\mathrm{2- Phenyl-2-bromopropane}$$ as the starting material is shown below. Identify [A] and [B] formed in the reaction.

$$ \mathrm{C}_6 \mathrm{H}_5-\mathrm{C}\left(\mathrm{CH}_3\right)_2^{-} \mathrm{Br} \xrightarrow[\Delta]{\text { KOH Alcoholic }}[\mathrm{A}] $$

$$ [\mathrm{A}]+\mathrm{HBr} \xrightarrow{\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CO})_2 \mathrm{O}\right.}[\mathrm{B}]$$

COMEDK 2023 Evening Shift
22

Which one of the following will undergo Nucleophilic substitution, by $$\mathrm{S}_{\mathrm{N}}{ }^1$$ mechanism, fastest?

COMEDK 2023 Evening Shift
23

Alkyl halides undergoing SN2 reaction do inverse

COMEDK 2022
24

The reaction $$\mathrm{ArN_2^ + C{l^ - }\buildrel {Cu/HCl} \over \longrightarrow ArCl + {N_2} + CuCl}$$ is called as

COMEDK 2021
25

Benzene reacts with chlorine in sunlight to give a final product

COMEDK 2020
26

An alkyl halide reacts with alcoholic ammonia in a sealed tube, the product formed will be

COMEDK 2020
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12