Haloalkanes and Haloarenes — JEE Main PYQs

Reaction of Grignard reagent, ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{MgBr}$ with ${\mathrm{C}}_8{\mathrm{H}}_8\mathrm{O}$ followed by hydrolysis gives compound "A" which reacts instantly with Lucas reagent to give compound …

The major product of the following reaction, if it occurs by SN2 mechanism, is : [reaction scheme + structure options — see source PDF]

Consider the following reactions, which of these reaction(s) will not produce Saytzeff product?

Which of these reaction(s) will not produce Saytzeff product?

For the following reactions:

where,

${\mathrm{k}}_{\mathrm{s}}$ and ${\mathrm{k}}_{\mathrm{e}}$ are respectively, the rate constant for substitution and elimination, and $\mu =\frac{{\mathrm{k}}_{\mathrm{s}}}{{\mathrm{k}}_{\mathrm{e}}}$, the correct option is ____

The decreasing order of reactivity towards dehydrohalogenation $\left({\mathrm{E}}_1\right)$ reaction of the following compounds is :
(A)
(B)
(C)
(D)

The mechanism of ${\mathrm{S}}_{\mathrm{N}}1$ reaction is given as:

A student writes general characteristics based on the given mechanism as:
(a) The reaction is favoured by weak nucleophiles.
(b) ${\mathrm{R}}^{\oplus }$ would be easily formed if the substituents are bulky.
(c) The …

The decreasing order or reactivity of the following compounds towards nucleophilic substitution $\left({\mathrm{S}}_{\mathrm{N}}2\right)$ is:

The major products of the following reaction are:

The decreasing order of reactivity of the following organic molecules towards $\mathrm{AgNO}{}_3$ solution is:

Which of the following compounds will form the precipitate with aq. ${\mathrm{AgNO}}_3$ solution most readily ?

Which of the following compounds will produce a precipitate with ${\mathrm{AgNO}}_3$ ?

The major product(s) obtained in the following reaction is/ are:

The major product obtained in the given reaction is

Which one of the following is likely to give a precipitate with ${\mathrm{AgNO}}_3$ solution?

An 'Assertion' and a 'Reason' are given below. Choose the correct answer from the following options.
Assertion (A): Vinyl halides do not undergo nucleophilic substitution easily.
Reason (R): Even though the intermediate carbocation is stabilized by loosely held p-electrons, the c …

Increasing order of reactivity of the following compounds for ${\mathrm{S}}_{\mathrm{N}}1$ substitution is:

Which of the following potential energy (PE) diagrams represents the ${\mathrm{S}}_{\mathrm{N}}1$ reaction?

Increasing rate of ${\mathrm{S}}_{\mathrm{N}}1$ reaction in the following compounds is

The increasing order of the reactivity of the following halides for the ${\mathrm{S}}_{\mathrm{N}}1$ reaction

(I) (see structure)
(II) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{Cl}$
(III) …

Which of the following, upon treatment with tert-BuONa followed by addition of bromine water, fails to decolourize the colour of bromine?

The major product obtained in the following reaction is: [PhCHBr-CH₂Ph treated with tBuOK — structure in source]

2-chloro-2-methylpentane on reaction with sodium methoxide in methanol yields :

The synthesis of alkyl fluorides is best accomplished by:

In ${\mathrm{S}}_{\mathrm{N}}2$ reactions, the correct order of reactivity for the following compounds: ${\mathrm{CH}}_3\mathrm{Cl},{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl},({\mathrm{CH}}_3{)}_2\mathrm{CHCl}$ and $({\mathrm{CH}}_3{)}_3\mathrm{CCl}$ is:

The major organic compound formed by the reaction of 1,1,1-trichloroethane with silver powder is:

Compound (A), ${\mathrm{C}}_8{\mathrm{H}}_9\mathrm{Br}$, gives a white precipitate when warmed with alcoholic ${\mathrm{AgNO}}_3$. Oxidation of (A) gives a acid (B), ${\mathrm{C}}_8{\mathrm{H}}_6{\mathrm{O}}_4$. (B) easily forms anhydride on heating. Identify the compound (A) …

What is DDT among the following :

Consider the following bromides:

The correct order of $S_{N}1$ reactivity is

Which of the following on heating with aqueous KOH , produces acetaldehyde ?

The organic chloro compound, which shows complete stereochemical inversion during a ${\mathrm{S}}_{\mathrm{N}}2$ reaction, is

The treatment of ${\mathrm{CH}}_3\mathrm{MgX}$ with ${\mathrm{CH}}_3\mathrm{C}\equiv \mathrm{C}-\mathrm{H}$ produces

Which of the following is the correct order of decreasing ${\mathrm{SN}}^2$ reactivity?
($\mathrm{X}=\mathrm{a}$ halogen)

Phenyl magnesium bromide reacts with methanol to give

${\mathrm{CH}}_3\mathrm{Br}+{\mathrm{Nu}}^{-}⟶{\mathrm{CH}}_3-\mathrm{Nu}+{\mathrm{Br}}^{-}$

The decreasing order of the rate of the above reaction with nucleophiles ( ${\mathrm{Nu}}^{-}$) A to D is $[{\mathrm{Nu}}^{-}=(\mathrm{A}){\mathrm{PhO}}^{-}$, ( …

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

Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces

The alkene formed as a major product in the above elimination reaction is

Tertiary alkyl halides are practically inert to substitution by ${\mathrm{S}}_{\mathrm{N}}^2$ mechanism because of

Alkyl halides react with dialkyl copper reagents to give

Elimination of bromine from 2-bromobutane results in the formation of-

The compound formed on heating chlorobenzene with chloral in the presence concentrated sulphuric acid is

Acetyl bromide reacts with excess of ${\mathrm{CH}}_3\mathrm{MgI}$ followed by treatment with a saturated solution of ${\mathrm{NH}}_4\mathrm{Cl}$ given