Haloalkanes and Haloarenes — JEE Main PYQs

Given below are two statements:

Statement - I: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow ${\mathrm{S}}_{\mathrm{N}}2$ mechanism.
Statement - II: A secondary alkyl halide when treated with a la …

For the reaction:


The correct statement is:

The group of chemicals used as pesticide is

The correct order of reactivity of following haloarenes towards nucleophilic substitution with aqueous NaOH is :
A. (see structure)
B. (see structure)
C. (see structure)
D. (see structure)

Choose the correct answer from the options given below:

Choose the halogen which is most reactive towards ${\mathrm{S}}_{\mathrm{N}}1$ reaction in the given compounds (A, B, C & D)
A.
B.
C.
D.

Identify the correct order of reactivity for the following pairs towards the respective mechanism
(A)
(B)
(C) Electrophilic substitution
(D) Nucleophilic substitution

Choose the correct answer from the options given below :

Where Nu $=$ Nucleophile
Find out the correct statement from the options given below for the above 2 reactions.

Which of the following compounds is an example of Freon?

Compound from the following that will not produce precipitate on reaction with ${\mathrm{AgNO}}_3$ is :

The number of possible isomeric products formed when 3-chloro-1-butene reacts with HCl through carbocation formation is ______

2-Methyl propyl bromide reacts with ${\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{O}}^{-}$and gives 'A' whereas on reaction with ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ it gives ' $B$ '. The mechanism followed in these reactions and the products 'A' and 'B' respectively are:

Match List I with List II

1-Bromopropane is reacted with reagents in List I to give product in List II

Identify the incorrect option from the following:

Assertion A : Hydrolysis of an alkyl chloride is a slow reaction but in the presence of NaI, the rate of the hydrolysis increases.
Reason R : ${\mathrm{I}}^{-}$ is a good nucleophile as well as a good leaving group.
In the light of the above statements, choose the correct answer fr …

Which of the following is true about freons ?

Number of moles of AgCl formed in the following reaction is ______.

The compound which will have the lowest rate towards nucleophilic aromatic substitution on treatment with ${\mathrm{OH}}^{-}$ is

The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)

The graph which represents the following reaction is :
${\left({\mathrm{C}}_6{\mathrm{H}}_5\right)}_3\mathrm{C}-\mathrm{Cl}\underset{\text{ Pyridine }}{\overset{{\mathrm{OH}}^{-}}{\to }}{\left({\mathrm{C}}_6{\mathrm{H}}_5\right)}_3\mathrm{C}-\mathrm{OH}$

In the following halogenated organic compounds the one with maximum number of chlorine atoms in its structure is :

Decreasing order towards ${\mathrm{S}}_{\mathrm{N}}1$ reaction for the following compounds is:
(a) (see structure)
(b) (see structure)
(c) (see structure)
(d) (see structure)

$\mathrm{C}{\mathrm{H}}_3-\mathrm{C}{\mathrm{H}}_2-\underset{|}{\underset{OH}{\mathrm{CH}}}-\mathrm{C}{\mathrm{H}}_3\underset{\text{(iii) }{\mathrm{D}}_2\mathrm{O}}{\overset{\text{(i) NaI, }{\mathrm{H}}_3\mathrm{P}{\mathrm{O}}_4;\text{(ii) Mg, dry ether}}{\to }}[X]$

Product $[X]$ formed in the above reaction is:

Compound 'A' undergoes following sequence of reactions to give compound 'B'. The correct structure and chirality of compound 'B' is:
[where Et is $-{\mathrm{C}}_2{\mathrm{H}}_5$]

Identify the correct statement for the below given transformation.

A 100 mL solution of $\mathrm{CH}{}_3\mathrm{CH}{}_2\mathrm{MgBr}$ on treatment with methanol produces 2.24 mL of a gas at STP. The weight of gas produced is ____ mg. [nearest integer]

Which reactant will give the following alcohol on reaction with one mole of phenyl magnesium bromide (PhMgBr) followed by acidic hydrolysis?

Which one of the following compounds is inactive towards $\mathrm{S}{}_{\mathrm{N}}1$ reaction?

Two isomers (A) and (B) with Molar mass 184 $\mathrm{g}/\mathrm{mol}$ and elemental composition $\mathrm{C}$, 52.2 %; $\mathrm{H}$, 4.9% and $\mathrm{Br}$ 42.9 % gave benzoic acid and p-bromobenzoic acid, respectively on oxidation with ${\mathrm{KMnO}}_4$. Isomer ' A ' is optic …

In the given conversion the compound A is:

Consider the above reaction. The number of $\pi$ electrons present in the product 'P' is ____.

In the given reaction 'A' can be

The IUPAC name of ethylidene chloride is :-

The major product in the reaction

The product formed in the first step of the reaction of



with excess $\mathrm{Mg}/{\mathrm{Et}}_2\mathrm{O}\left(\mathrm{Et}={\mathrm{C}}_2{\mathrm{H}}_5\right)$ is :

Among the following compounds I-IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. ${\mathrm{HNO}}_3$ (iii) ${\mathrm{AgNO}}_3$ ?

In the given reaction, 3-bromo-2,2-dimethylbutane $\stackrel{{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\to }$ 'A' (major product). Product A is:

To synthesise 1.0 mole of 2-methylpropan-2-ol from Ethylethanoate ____ equivalents of ${\mathrm{CH}}_3\mathrm{MgBr}$ reagent will be required. (Integer value)

The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is:
(i) (see structure)
(ii) (see structure)
(iii) (see structure)
(iv) (see structure)

The major product (A) formed in the reaction given below is

Identify A and B in the chemical reaction.

For the given reaction:

What is 'A'?

In the following sequence of reactions the P is:

For following sequence of reactions, the correct products are:

The correct order of reactivity of the given chlorides with acetate in acetic acid is :

The above reaction requires which of the following reaction conditions?

Consider the above reaction, the major product 'P' is:

Which one of the following chemical agent is not being used for dry-cleaning of clothes?

What is A in the following reaction?

(i) ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{MgBr}$
$\underset{\text{ (ii) }{\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{\text{(1.0 equivalent), dry Ether }}{\to }}\underset{\text{ Major Product }}{\mathrm{X}}$

The structure of $X$ is:

Match List - I with List - II:

List - I (Chemicals):
(a) Alcoholic potassium hydroxide
(b) $\mathrm{Pd}/{\mathrm{BaSO}}_4$
(c) BHC (Benzene hexachloride)
(d) Polyacetylene

List - II (Use / Preparation / Constituent):
(i) electrodes in batteries
(ii) obtained by addition react …