Hydrocarbons
174 Questions
Start JEE Mains Test
2021
Q101
JEE Mains
MCQ
14 Mar 2026
Choose the correct statement regarding the formation of carbocations A and B given.
A.
Carbocation A is more stable and formed relatively at faster rate
B.
Carbocation B is more stable and formed relatively at slow rate
C.
Carbocation B is more stable and formed relatively at faster rate
D.
Carbocation A is more stable and formed relatively at slow rate
2021
Q102
JEE Mains
MCQ
14 Mar 2026
Given below are two statements :
Statement I : 2-methylbutane on oxidation with KMnO4 gives 2-methylbutan-2-ol.
Statement II : n-alkanes can be easily oxidised to corresponding alcohols with KMnO4.
Choose the correct option :
Statement I : 2-methylbutane on oxidation with KMnO4 gives 2-methylbutan-2-ol.
Statement II : n-alkanes can be easily oxidised to corresponding alcohols with KMnO4.
Choose the correct option :
A.
Both statement I and statement II are incorrect
B.
Both statement I and statement II are correct
C.
Statement I is correct but statement II is incorrect
D.
Statement I is incorrect but statement II is correct
2021
Q103
JEE Mains
MCQ
14 Mar 2026
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 :
A.
HC $ \equiv $ C $-$ CH2 $-$ CH3
B.
C.
CH3 $-$ C $ \equiv $ C $-$ CH3
D.
2021
Q104
JEE Mains
MCQ
14 Mar 2026
Which of the following is Lindlar catalyst?
A.
Partially deactivated palladised charcoal
B.
Zinc chloride and HCl
C.
Sodium and Liquid NH3
D.
Cold dilute solution of KMnO4
2021
Q105
JEE Mains
MCQ
14 Mar 2026
In $\mathop C\limits^1 {H_2} = \mathop C\limits^2 = \mathop C\limits^3 H - \mathop C\limits^4 {H_3}$ molecule, the hybridization of carbon 1, 2, 3 and 4 respectively, are :
A.
sp2, sp, sp2, sp3
B.
sp2, sp2, sp2, sp3
C.
sp3, sp, sp3, sp3
D.
sp2, sp3, sp2, sp3
2021
Q106
JEE Mains
MCQ
14 Mar 2026
The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is :
A.
$C{H_3}COCl/AlC{l_3},B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$
B.
$C{H_3}COCl/AlC{l_3},Zn - Hg/HCl,B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4}$
C.
$B{r_2}/AlB{r_3},C{H_3}COCl/AlC{l_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$
D.
$HN{O_3}/{H_2}S{O_4},B{r_2}/AlC{l_3},C{H_3}COCl/AlC{l_3},Zn - Hg/HCl$
2021
Q107
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2021
Q108
JEE Mains
MCQ
14 Mar 2026
Identify A in the given chemical reaction.
A.
B.
C.
D.
2021
Q109
JEE Mains
MCQ
14 Mar 2026
The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is :
A.
(iv) < (i) < (ii) < (iii)
B.
(iv) < (iii) < (ii) < (i)
C.
(iv) < (i) < (iii) < (ii)
D.
(i) < (ii) < (iii) < (iv)
2021
Q110
JEE Mains
MCQ
14 Mar 2026
Identify products A and B.
A.
B.
C.
D.
2021
Q111
JEE Mains
Numerical
14 Mar 2026
Consider the above chemical reaction. The total number of stereoisomers possible for Product 'P' is _____________.
Correct Answer: 2
Explanation:
The total number of products possible = 2
2021
Q112
JEE Mains
Numerical
14 Mar 2026
The number of sigma bonds in
is _______________.
is _______________.
Correct Answer: 10
Explanation:
Numbers of $\sigma$ bonds = 10
2021
Q113
JEE Mains
Numerical
14 Mar 2026
Consider the following chemical reaction.
The number of sp2 hybridized carbon atom(s) present in the product is ________.
The number of sp2 hybridized carbon atom(s) present in the product is ________.
Correct Answer: 7
Explanation:
All the 7-carbon-atoms in product are sp2 hybridised.
2020
Q114
JEE Mains
MCQ
14 Mar 2026
The major product obtained from the following
reaction is :
A.
B.
C.
D.
2020
Q115
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2020
Q116
JEE Mains
MCQ
14 Mar 2026
Which of the following compounds produces an optically inactive compound on hydrogenation?
A.
B.
C.
D.
2020
Q117
JEE Mains
MCQ
14 Mar 2026
The major product in the following reaction is :
A.
B.
C.
D.
2020
Q118
JEE Mains
MCQ
14 Mar 2026
The major product (Y) in the following
reactions is :
A.
B.
C.
D.
2020
Q119
JEE Mains
MCQ
14 Mar 2026
The correct order of heat of combustion for
following alkadienes is :
A.
(b) < (c) < (a)
B.
(a) < (c) < (b)
C.
(a) < (b) < (c)
D.
(c) < (b) < (a)
2020
Q120
JEE Mains
MCQ
14 Mar 2026
The major product [B] in the following
sequence of reactions is :-
A.
B.
C.
D.
2020
Q121
JEE Mains
MCQ
14 Mar 2026
The major product in the following reaction is:
A.
B.
C.
D.
2020
Q122
JEE Mains
MCQ
14 Mar 2026
In the following reactions sequence, structure of A and B respectively will be :
A.
B.
C.
D.
2020
Q123
JEE Mains
MCQ
14 Mar 2026
Consider the following reaction :
${\left( {C{H_3}} \right)_3}CCH\left( {OH} \right)C{H_3}\buildrel {conc.\,\,\,{H_2}S{O_4}} \over \longrightarrow $
${\left( {C{H_3}} \right)_2}CHCH\left( {Br} \right)C{H_3}\buildrel {alc.\,\,KOH} \over \longrightarrow $
${\left( {C{H_3}} \right)_2}{\rm{ }}CHCH\left( {Br} \right)C{H_3}\buildrel {{{(C{H_3})}_3}{O^\Theta }{K^ \oplus }} \over \longrightarrow $
${\left( {C{H_3}} \right)_2}\mathop C\limits_{\mathop |\limits_{OH} } - C{H_2} - CHO\buildrel \Delta \over \longrightarrow $
Which of these reaction(s) will not produce Saytzeff product ?
${\left( {C{H_3}} \right)_3}CCH\left( {OH} \right)C{H_3}\buildrel {conc.\,\,\,{H_2}S{O_4}} \over \longrightarrow $
${\left( {C{H_3}} \right)_2}CHCH\left( {Br} \right)C{H_3}\buildrel {alc.\,\,KOH} \over \longrightarrow $
${\left( {C{H_3}} \right)_2}{\rm{ }}CHCH\left( {Br} \right)C{H_3}\buildrel {{{(C{H_3})}_3}{O^\Theta }{K^ \oplus }} \over \longrightarrow $
${\left( {C{H_3}} \right)_2}\mathop C\limits_{\mathop |\limits_{OH} } - C{H_2} - CHO\buildrel \Delta \over \longrightarrow $
Which of these reaction(s) will not produce Saytzeff product ?
A.
(d) only
B.
(b) and (d)
C.
(a), (c) and (d)
D.
(c) only
2020
Q124
JEE Mains
Numerical
14 Mar 2026
The minimum number of moles of O2
required for complete combustion of 1 mole of propane and 2
moles of butane is _____.
Correct Answer: 18
Explanation:
C3H8(g) + 5O2(g) $ \to $ 3CO2(g) + 4H2O(l)
C4H10(g) + ${{13} \over 2}$O2(g) $ \to $ 4CO2(g) + 5H2O(l)
$ \therefore $ No. of moles of O2 required to oxidise 1 mole of propane = 5
$ \therefore $ No. of moles of O2 required to oxidise 1 mole of butane = ${{13} \over 2}$
So, No. of moles of O2 required to oxidise 1 mole of
propane and 2 moles of butane = 5 + 2 $ \times $ ${{13} \over 2}$ = 18
C4H10(g) + ${{13} \over 2}$O2(g) $ \to $ 4CO2(g) + 5H2O(l)
$ \therefore $ No. of moles of O2 required to oxidise 1 mole of propane = 5
$ \therefore $ No. of moles of O2 required to oxidise 1 mole of butane = ${{13} \over 2}$
So, No. of moles of O2 required to oxidise 1 mole of
propane and 2 moles of butane = 5 + 2 $ \times $ ${{13} \over 2}$ = 18
2020
Q125
JEE Mains
Numerical
14 Mar 2026
The total number of monohalogenated organic
products in the following (including
stereoisomers) reaction is ______.
Correct Answer: 8
Explanation:
2020
Q126
JEE Mains
Numerical
14 Mar 2026
In the following sequence of reactions the
maximum number of atoms present in
molecule 'C' in one plane is _________.
(A is a lowest molecular weight alkyne)
(A is a lowest molecular weight alkyne)
Correct Answer: 13
Explanation:
As A is a lowest molecular weight alkyne. So A is H - C $ \equiv $ C - H.
2019
Q127
JEE Mains
MCQ
14 Mar 2026
Consider the following reactions :
'A' is :
'A' is :
A.
$CH \equiv CH$
B.
$C{H_3} - C \equiv C - C{H_3}$
C.
$C{H_3} - C \equiv CH$
D.
$C{H_2} = C{H_2}$
2019
Q128
JEE Mains
MCQ
14 Mar 2026
In the following skew conformation of ethane, H'–C–C–H'' dihedral angle is :
A.
120o
B.
58o
C.
151o
D.
149o
2019
Q129
JEE Mains
MCQ
14 Mar 2026
The major product of the following addition reaction is :
H3C–CH=CH2 $\buildrel {C{l_2}/{H_2}O} \over \longrightarrow $
H3C–CH=CH2 $\buildrel {C{l_2}/{H_2}O} \over \longrightarrow $
A.
B.
C.
D.
2019
Q130
JEE Mains
MCQ
14 Mar 2026
But-2-ene on reaction with alkaline KMnO4 at elevated temperature followed by acidification will give :
A.
one molecule of CH3CHO and one molecule of CH3COOH
B.
2 molecules of CH3COOH
C.
D.
2 molecules of CH3CHO
2019
Q131
JEE Mains
MCQ
14 Mar 2026
Increasing order of reactivity of the following
compounds for SN1 substitution is:
A.
(A) < (B) < (D) < (C)
B.
(B) < (C) < (D) < (A)
C.
(B) < (A) < (D) < (C)
D.
(B) < (C) < (A) < (D)
2019
Q132
JEE Mains
MCQ
14 Mar 2026
Which of the following potential energy (PE)
diagrams represents the SN1 reaction?
A.
B.
C.
D.
2019
Q133
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
CH3CD2CH(Cl)(I)
B.
CH3CD(Cl)CHD(I)
C.
CH3C(I)(Cl)CHD2
D.
CH3CD(I)CHD(Cl)
2019
Q134
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2019
Q135
JEE Mains
MCQ
14 Mar 2026
Polysubstitution is a major drawback in:
A.
Reimer Tiemann reaction
B.
Friedel Craft's alkylation
C.
Acetylation of aniline
D.
Friedel Craft's acylation
2019
Q136
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
CH3CH2C$ \equiv $CH
B.
CH3CH=C=CH2
C.
D.
CH3CH=CHCH2NH2
2019
Q137
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is –
A.
B.
C.
D.
2019
Q138
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is –
A.
B.
C.
D.
2019
Q139
JEE Mains
MCQ
14 Mar 2026
The correct order for acid strength of compounds :
CH $ \equiv $ CH, CH3–C $ \equiv $ CH and CH2 = CH2 is as follows
CH $ \equiv $ CH, CH3–C $ \equiv $ CH and CH2 = CH2 is as follows
A.
CH $ \equiv $ CH > CH2 = CH2 > CH3 – C $ \equiv $ CH
B.
CH3 – C $ \equiv $ CH > CH2 = CH2 > HC $ \equiv $ CH
C.
HC $ \equiv $ CH > CH3 – C $ \equiv $ CH > CH2 = CH2
D.
CH3 – CH $ \equiv $ CH > CH $ \equiv $ CH > CH2 = CH2
2019
Q140
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is
A.
B.
C.
photo due
D.
2019
Q141
JEE Mains
MCQ
14 Mar 2026
Which compound (s) out of the following is/are not aromatic ?
A.
(A) and (C)
B.
(C) and (D)
C.
(B)
D.
(B), (C) and (D)
2019
Q142
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is
A.
B.
C.
D.
2019
Q143
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2018
Q144
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2018
Q145
JEE Mains
MCQ
14 Mar 2026
The trans-alkenes are formed by the reduction of alkynes with
A.
Sn - HCl
B.
H2 – Pd/C, BaSO4
C.
NaBH4
D.
Na/liq. NH3
2018
Q146
JEE Mains
MCQ
14 Mar 2026
The major product formed in the following reaction is :
A.
B.
C.
D.
2018
Q147
JEE Mains
MCQ
14 Mar 2026
When 2-butyne is treate with H2/Lindlar's catalyst, compound X is produced as the major product and when treated with Na/liq. NH3 it produces Y as the major product Which of the following statements is correct ?
A.
X will have higher dipole moment and higher boiling point than Y.
B.
Y will have higher dipole moment and higher boiling point than X.
C.
X will have lower dipole moment and lower boiling point than Y.
D.
Y will have higher dipole momet and lower boiling point than X.
2018
Q148
JEE Mains
MCQ
14 Mar 2026
Which of the following will most readily give the dehydrohalogenation product ?
A.
B.
C.
D.
2017
Q149
JEE Mains
MCQ
14 Mar 2026
The major product of the following reaction is :
A.
B.
C.
D.
2016
Q150
JEE Mains
MCQ
14 Mar 2026
Consider the reaction sequence below :
X is:
X is:
A.
B.
C.
D.
