Hydrocarbons — JEE Main PYQs

Among the following, the aromatic compounds are:
(A) (see structure)
(B) (see structure)
(C) (see structure)
(D) (see structure)
Choose the correct answer from the following options:

Which of the following is Lindlar catalyst?

Identify the reagent(s) 'A' and condition(s) for the reaction

An unsaturated hydrocarbon $X$ on ozonolysis gives $A$. Compound $A$ when warmed with ammonical silver nitrate forms a bright silver mirror along the sides of the test tube. The unsaturated hydrocarbon $X$ is:

Given below are two statements:
Statement I : 2-methylbutane on oxidation with ${\mathrm{KMnO}}_4$ gives 2-methylbutan-2-ol.
Statement II: n-alkanes can be easily oxidised to corresponding alcohols with ${\mathrm{KMnO}}_4$. Choose the correct option:

Considering the above chemical reaction, identify the product " X ":

For the reaction of (E)-but-2-ene type alkene [H₃C-CH=CH-CH₃, structure shown] with Br₂ in CCl₄ giving product 'P', the total number of stereoisomers possible for product 'P' is ______.

Consider the following reactions:
(a)
(b)
(c)
(d)

Which of these reactions are possible?

The major product $[\mathrm{B}]$ in the following sequence is:

An unsaturated hydrocarbon $X$ absorbs two hydrogen molecules on catalytic hydrogenation, and also gives following reaction: …

In the following sequence of reactions the maximum number of atoms present in molecule ' $C$ ' in one plane is …

In the following reaction A is :

(i) ${\mathrm{Br}}_2,\mathrm{h}\nu$
(ii) KOH (alc.)
(iii) ${\mathrm{O}}_3$
(iv) ${\left({\mathrm{CH}}_3\right)}_2\mathrm{S}$
(v) $\mathrm{NaOH}(\mathrm{aq})+\Delta$

(see product structure)

The major product (Y) in the following reactions is:

Which of these will produce the highest yield in Friedel Crafts reaction?

The final major product of the following reaction is:
(i) ${\mathrm{Ac}}_2\mathrm{O}/$ Pyridine
(ii) ${\mathrm{Br}}_2,{\mathrm{FeCl}}_3$
(iii) ${\mathrm{OH}}^{-}/\Delta$
Me

The major product formed in the following reaction is:
${\mathrm{CH}}_3\mathrm{CH}=\mathrm{CHCH}{\left({\mathrm{CH}}_3\right)}_2\stackrel{\mathrm{HBr}}{\to }$

The total number of monohalogenated organic products in the following (including stereoisomers) reaction is ____.

The compound A in the following reactions is: …

The increasing order of the boiling points of the major products A, B and C of the following reactions will be:
(a)
(b)
(c)

In the following reaction sequence the major products A and B are:

Consider the following reactions:

(see reaction scheme)

' A ' is :

The major product obtained from the following reaction is:

$[\mathrm{P}]$ on treatment with ${\mathrm{Br}}_2/{\mathrm{FeBr}}_3$ in ${\mathrm{CCl}}_4$ produced a single isomer ${\mathrm{C}}_8{\mathrm{H}}_7{\mathrm{O}}_2\mathrm{Br}$ while heating $[\mathrm{P}]$ with sodalime gave toluene. The compound $[\mathrm{P}]$ is:

The major product $[R]$ in the following sequence of reactions is:

The major product $[\mathrm{C}]$ in the following reaction sequence will be: …

The major product of the following reaction

Which one of the following alkenes when treated with HCl yields majorly an anti Markovnikov product?

Polysubstitution is a major drawback in:

The major product of the following reaction is:

The increasing order of reactivity of thefollowing compounds towards aromatic electrophilic substitution reaction is

Which hydrogen in compound(E) is easily replaceable during bromination reaction in presence of light?

The major product of the following addition reaction is:

But-2-ene on reaction with alkaline ${\mathrm{KMnO}}_4$ at elevated temperature followed by acidification will give :

The major product of the following reactions is:

The correct order for acid strength of compounds:
$\mathrm{CH}\equiv \mathrm{CH},{\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{CH},{\mathrm{CH}}_2={\mathrm{CH}}_2$
is as follows:

Consider the following reactions :

' $A$ ' is:

Heating of 2-chloro-1-phenylbutane with EtOK/EtOH gives $X$ as the major product. Reaction of X with $\mathrm{Hg}(\mathrm{OAc}){}_2/\mathrm{H}{}_2\mathrm{O}$ followed by $\mathrm{NaBH}{}_4$ gives Y as the major product. Y is:

The increasing order of the reactivity of the following compounds towards electrophilic aromatic substitution reaction is:

(I) (see structure)
(II) (see structure)
(III) (see structure)

The trans-alkenes are formed by the reduction of alkynes with :

Which of the following compounds will form significant amount of meta product during mono-nitration reaction?

3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is :

The reaction of propene with $\mathrm{HOCl}\left({\mathrm{Cl}}_2+{\mathrm{H}}_2\mathrm{O}\right)$ proceeds through the intermediate:

The product of the reaction given below is:

Which compound would give 5-keto-2-methyl hexanal upon ozonolysis?

In the reaction,

the product C is:

Which branched chain isomer of the hydrocarbon with molecular mass 72 u gives only one isomer of mono substituted alky halide ?

2-Hexyne gives trans-2-Hexene on treatment with :

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :

One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u . The alkene is

Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives