Haloalkanes and Haloarenes — JEE Main PYQs

The correct order of reactivity of ${\mathrm{CH}}_3\mathrm{Br}$ in methanol with the following nucleophiles is ${\mathrm{F}}^{-},{\mathrm{I}}^{-},{\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{O}}^{-}$and ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{O}}^{-}$

The correct order of the rate of reaction of the following reactants with nucleophile by ${\mathrm{S}}_{\mathrm{N}}1$ mechanism is :
(Given : Structure I and II are rigid)

The correct order of reactivity of the following benzyl halides towards reaction with KCN is:

The correct order of the rate of the reaction for the following reaction with respect to nucleophiles is:
${\mathrm{CH}}_3\mathrm{Br}+{\mathrm{Nu}}^{\Theta }⟶{\mathrm{CH}}_3\mathrm{Nu}+{\mathrm{Br}}^{\Theta }$

Given below are four compounds:
(a) n-propyl chloride
(b) iso-propyl chloride
(c) sec-butyl chloride
(d) neo-pentyl chloride

Percentage of carbon in the one which exhibits optical isomerism is:

Consider the following reaction :

$\underset{\text{ (ii) }\text{ ↓ }-\mathrm{Br}}{\overset{\text{ (i) }{\mathrm{NaNH}}_2}{\to }}\mathrm{Y}$

The product Y formed is :

The correct sequence of reagents for the above conversion of X to Y is :

Identify (P)

Given below are two statements :
Statement I: 'C-Cl' bond is stronger in ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{Cl}$ than ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{Cl}$
Statement II : The given optically active molecule, (see structure) on hydrolysis gives a solution that can rotate …

Grignard reagent $\mathrm{RMgBr}(\mathrm{P})$ reacts with water and forms a gas ( Q ). One gram of Q occupies $1.4{\mathrm{dm}}^3$ at STP. (P) on reaction with dry ice in dry ether followed by ${\mathrm{H}}_3{\mathrm{O}}^{+}$ forms a compound (Z). 0.1 mole of (Z) will weigh _____ …

Given below are two statements:

Statement (I): Benzyl chloride reacts faster in ${\mathrm{S}}_{\mathrm{N}}1$ mechanism than ethyl chloride.

Statement (II): Ethyl carbocation intermediate is less stabilized by hyperconjugation than benzyl carbocation by resonance.

In the light o …

Correct statements regarding alkyl halides ( $\mathrm{R}-\mathrm{X}$ ) among the following are :
(A) Alcohol being less polar solvent as compared to water, alcoholic KOH favours elimination reaction with $\mathrm{R}-\mathrm{X}$.
(B) Order of reactivity towards …

RMgI when treated with ice cold water liberated a gas which occupied 1.4 dm³/g at STP. The gas produced is further reacted with iodine in presence of HIO₃ to give compound (X). Compound (X) in presence of Na and dry ether produced compound (Y). Molar mass of compound (Y) is ____ …

n-Butane on monochlorination under photochemical conditions gives an optically active compound "P". "P" on further chlorination gives dichloro compounds.

The number of dichloro compounds obtained (ignore stereoisomers) is :

Given below are two statements :

Statement I: ${\mathrm{CH}}_3-\mathrm{O}-{\mathrm{CH}}_2-\mathrm{Cl}$ will undergo ${\mathrm{S}}_{\mathrm{N}}1$ reaction though it is a primary halide.

Statement II:

will not undergo ${\mathrm{S}}_{\mathrm{N}}2$ reaction very easily though it is …

The maximum number of RBr producing 2-methylbutane by above sequence of reactions is ______. (Consider the structural isomers only)

Given below are two statements :

Statement-I : The conversion proceeds well in the less polar medium.

${\mathrm{CH}}_2-\mathrm{OH}+{\mathrm{Cl}}^{-}$

Statement-II : The conversion proceeds well in the more polar medium.

In the light of the above statements, choose the correct …

The structure of the major product formed in the following reaction is :
(see structure)

Match the LIST-I with LIST-II

Choose the correct answer from the options given below:

Given below are two statements :

Statement I :
(see structure A)
will undergo alkaline hydrolysis at a faster rate than
(see structure B)

Statement II :
(see structure C)
intramolecular substitution takes place first by involving lone pair of electrons on nitrogen.
In the light …

The products A and B in the following reactions, respectively are
$\mathrm{A}\stackrel{\mathrm{Ag}-{\mathrm{NO}}_2}{⟶}{\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{Br}\stackrel{\mathrm{AgCN}}{\to }\mathrm{B}$

Consider the following sequence of reactions:

Chlorobenzene

11.25 mg of chlorobenzene will produce ______ × 10⁻¹ mg of product B.
(Consider the reactions result in complete conversion.)
[Given molar mass of C, H, O, N and Cl as 12, 1, 16, 14 and 35.5 g mol⁻¹ respectively]

The ascending order of relative rate of solvolysis of following compounds is

In the following substitution reaction :

Product 'P' formed is :

Which among the following halides will generate the most stable carbocation in Nucleophillic substitution reaction?

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 …

Given below are two statements :

Statement (I) : Alcohols are formed when alkyl chlorides are treated with aqueous potassium hydroxide by elimination reaction.

Statement (II): In alcoholic potassium hydroxide, alkyl chlorides form alkenes by abstracting the hydrogen from the …

Predict the major product of the following reaction sequence :-

The reactions which cannot be applied to prepare an alkene by elimination, are
A. (see structure)
B. ${\mathrm{CH}}_3-{\mathrm{CH}}_2-\underset{\begin{array}{c}\mathrm{I}\\ \mathrm{Br}\end{array}}{\mathrm{CH}}-{\mathrm{CH}}_3\stackrel{\mathrm{KOH}\text{ (aq.) }}{\to }$
C. (see structure)
D. (se …

Identify the correct set of reagents or reaction conditions 'X' and 'Y' in the following set of transformation.

Find out the major product formed from the following reaction. [ $\mathrm{Me}:-{\mathrm{CH}}_3$ ]

${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-\mathrm{Br}+\mathrm{NaOH}\stackrel{{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\to }$ Product 'A'

Consider the above reactions, identify product B and product C .

Product P is

Identify the major product in the following reaction.

Match List I with List II :

Choose the correct answer fro …

Consider the above chemical reaction. Product " A " is:

Given below are two statements :

Statement (I): ${\mathrm{S}}_{\mathrm{N}}2$ reactions are 'stereospecific', indicating that they result in the formation only one stereo-isomers as the product.
Statement (II) : ${\mathrm{S}}_{\mathrm{N}}1$ reactions generally result in formati …

Which among the following compounds will undergo fastest ${\mathrm{S}}_{\mathrm{N}}2$ reaction.

In the following sequence of reaction, the major products B and C respectively are :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) :

Assertion (A) : ${\mathrm{S}}_{\mathrm{N}}2$ reaction of ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{Br}$ occurs more readily than the …

In the above reaction product ' P ' is

The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is ;

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Haloalkanes react with KCN to form alkyl cyanides as a main product while with AgCN form isocyanide as the main product.
Reason (R) : KCN and AgCN both are …

Which among the following halide/s will not show S_N1 reaction:
(A) H₂C=CH-CH₂Cl
(B) CH₃-CH=CH-Cl
(C) (see structure)
(D) (see structure)

Choose the most appropriate answer from the options given below:

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : Aryl halides cannot be prepared by replacement of hydroxyl group of phenol by halogen atom.
Reason R: Phenols react with halogen acids violently. In the light of …

The product ( C ) in the below mentioned reaction is:

The total number of hydrogen atoms in product A and product B is ______.

Example of vinylic halide is

Given below are two statement one is labeled as Assertion (A) and the other is labeled as Reason (R).

Assertion (A): ${\mathrm{CH}}_2=\mathrm{CH}-{\mathrm{CH}}_2-\mathrm{Cl}$ is an example of allyl halide

Reason (R): Allyl halides are the compounds in which the halogen atom i …

Compound A formed in the following reaction reacts with B gives the product C. Find out A and B.