MCQ (Single Correct Answer)

1

The reactions which cannot be applied to prepare an alkene by elimination, are

JEE Main 2025 (Online) 7th April Morning Shift Chemistry - Hydrocarbons Question 4 English

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 7th April Morning Shift
2

Given below are two statements:

Statement I : Ozonolysis followed by treatment with $\mathrm{Zn}, \mathrm{H}_2 \mathrm{O}$ of cis-2-butene gives ethanal.

Statement II : The product obtained by ozonolysis followed by treatment with $\mathrm{Zn}, \mathrm{H}_2 \mathrm{O}$ of 3, 6-dimethyloct-4-ene has no chiral carbon atom.

In the light of the above statements, choose the correct answer from the options given below

JEE Main 2025 (Online) 7th April Morning Shift
3

Predict the major product of the following reaction sequence:-

JEE Main 2025 (Online) 4th April Morning Shift Chemistry - Hydrocarbons Question 1 English

JEE Main 2025 (Online) 4th April Morning Shift
4

$$ \text { Which compound would give 3-methyl-6-oxoheptanal upon ozonolysis? } $$

JEE Main 2025 (Online) 3rd April Morning Shift
5

Given below are two statements :

Statement (I) : Neopentane forms only one monosubstituted derivative.

Statement (II) : Melting point of neopentane is higher than n-pentane.

In the light of the above statements, choose the most appropriate answer from the options given below :

JEE Main 2025 (Online) 2nd April Evening Shift
6

Match List - I with List - II.

List - I
(Reaction)
List - II
(Name of reaction)
(A) JEE Main 2025 (Online) 2nd April Evening Shift Chemistry - Hydrocarbons Question 5 English (I) Lucas reaction

(B) $$
\mathrm{ArN}_2^{+} \mathrm{X}^{-} \xrightarrow[\mathrm{HCl}]{\mathrm{Cu}} \mathrm{ArCl}+\mathrm{N}_2 \uparrow+\mathrm{CuX}
$$
(II) Finkelstein
reaction

(C) $$
\mathrm{C}_2 \mathrm{H}_5 \mathrm{Br}+\mathrm{NaI} \xrightarrow[\text { Acetone }]{\text { Dry }} \mathrm{C}_2 \mathrm{H}_5 \mathrm{I}+\mathrm{NaBr}
$$
(III)
Fittig reaction


(D) $$
\mathrm{CH}_3 \mathrm{C}(\mathrm{OH})\left(\mathrm{CH}_3\right) \mathrm{CH}_3 \xrightarrow[\mathrm{ZnCl}_2]{\mathrm{HCl}} \mathrm{CH}_3 \mathrm{C}(\mathrm{Cl})\left(\mathrm{CH}_3\right) \mathrm{CH}_3
$$
(IV)
Gatterman
reaction

$$ \text { Choose the correct answer from the options given below : } $$

JEE Main 2025 (Online) 2nd April Evening Shift
7

Total number of sigma (σ) _______ and pi(π) ______ bonds respectively present in hex-1-en-4-yne are:

JEE Main 2025 (Online) 29th January Evening Shift
8

The product B formed in the following reaction sequence is:

JEE Main 2025 (Online) 28th January Evening Shift Chemistry - Hydrocarbons Question 14 English
JEE Main 2025 (Online) 28th January Evening Shift
9

Identify product [A], [B] and [C] in the following reaction sequence.

$\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH} \xrightarrow[\mathrm{H}_2]{\mathrm{Pd} / \mathrm{C}}[\mathrm{A}] \xrightarrow[\text { (ii) } \mathrm{Zn}, \mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{O}_3}[\mathrm{~B}]+[\mathrm{C}]$

JEE Main 2025 (Online) 28th January Evening Shift
10

The product $(\mathrm{A})$ formed in the following reaction sequence is

JEE Main 2025 (Online) 24th January Morning Shift Chemistry - Hydrocarbons Question 7 English

JEE Main 2025 (Online) 24th January Morning Shift
11

Match List - I with List - II

List - I
(Isomers of $\mathrm{C}_{10} \mathrm{H}_{14}$ )
List - II
(Ozonolysis product)
(A) JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Hydrocarbons Question 8 English 1 (I) JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Hydrocarbons Question 8 English 2
(B) JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Hydrocarbons Question 8 English 3 (II) JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Hydrocarbons Question 8 English 4
(C) JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Hydrocarbons Question 8 English 5 (III) JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Hydrocarbons Question 8 English 6
(D) JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Hydrocarbons Question 8 English 7 (IV) JEE Main 2025 (Online) 23rd January Evening Shift Chemistry - Hydrocarbons Question 8 English 8

Choose the correct answer from the options given below :

JEE Main 2025 (Online) 23rd January Evening Shift
12

Match the List - I with List - II

List - I
Name reaction
List - II
Product obtainable
(A) Swarts reaction (I) Ethyl benzene
(B) Sandmeyer's reaction (II) Ethyl iodide
(C) Wurtz Fittig reaction (III) Cyanobenzene
(D) Finkelstein reaction (IV) Ethyl fluoride

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 23rd January Morning Shift
13

When sec-butylcyclohexane reacts with bromine in the presence of sunlight, the major product is :

JEE Main 2025 (Online) 22nd January Evening Shift
14

The alkane from below having two secondary hydrogens is :

JEE Main 2025 (Online) 22nd January Evening Shift
15

Given below are two statements :

Statement I : One mole of propyne reacts with excess of sodium to liberate half a mole of $\mathrm{H}_2$ gas.

Statement II : Four g of propyne reacts with $\mathrm{NaNH}_2$ to liberate $\mathrm{NH}_3$ gas which occupies 224 mL at STP.

In the light of the above statements, choose the most appropriate answer from the options given below :

JEE Main 2025 (Online) 22nd January Morning Shift
16

The incorrect statement regarding ethyne is

JEE Main 2024 (Online) 9th April Evening Shift
17

Identify the product A and product B in the following set of reactions.

JEE Main 2024 (Online) 9th April Morning Shift Chemistry - Hydrocarbons Question 27 English

JEE Main 2024 (Online) 9th April Morning Shift
18

Given below are two statements :

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

Statement (II) : $$\mathrm{S}_{\mathrm{N}} 1$$ reactions generally result in formation of product as racemic mixtures.

In the light of the above statements, choose the correct answer from the options given below :

JEE Main 2024 (Online) 8th April Evening Shift
19

In the given compound, the number of 2$$^\circ$$ carbon atom/s is ________.

JEE Main 2024 (Online) 8th April Morning Shift Chemistry - Hydrocarbons Question 24 English

JEE Main 2024 (Online) 8th April Morning Shift
20

JEE Main 2024 (Online) 6th April Evening Shift Chemistry - Hydrocarbons Question 21 English

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

JEE Main 2024 (Online) 6th April Evening Shift
21

Given below are two statements :

Statement I : Nitration of benzene involves the following step -

JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Hydrocarbons Question 22 English

Statement II : Use of Lewis base promotes the electrophilic substitution of benzene.

In the light of the above statements, choose the most appropriate answer from the options given below :

JEE Main 2024 (Online) 5th April Morning Shift
22

JEE Main 2024 (Online) 4th April Evening Shift Chemistry - Hydrocarbons Question 26 English

In the above chemical reaction sequence "$$\mathrm{A}$$" and "$$\mathrm{B}$$" respectively are

JEE Main 2024 (Online) 4th April Evening Shift
23
In the given reactions identify $A$ and $B$

JEE Main 2024 (Online) 1st February Evening Shift Chemistry - Hydrocarbons Question 38 English
JEE Main 2024 (Online) 1st February Evening Shift
24
JEE Main 2024 (Online) 1st February Evening Shift Chemistry - Hydrocarbons Question 37 English

Acid D formed in above reaction is :
JEE Main 2024 (Online) 1st February Evening Shift
25

Major product of the following reaction is -

JEE Main 2024 (Online) 31st January Evening Shift Chemistry - Hydrocarbons Question 35 English

JEE Main 2024 (Online) 31st January Evening Shift
26

Products A and B formed in the following set of reactions are

JEE Main 2024 (Online) 30th January Evening Shift Chemistry - Hydrocarbons Question 31 English

JEE Main 2024 (Online) 30th January Evening Shift
27

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

JEE Main 2024 (Online) 30th January Morning Shift Chemistry - Hydrocarbons Question 30 English

JEE Main 2024 (Online) 30th January Morning Shift
28

In the given reactions, identify the reagent A and reagent B.

JEE Main 2024 (Online) 30th January Morning Shift Chemistry - Hydrocarbons Question 29 English

JEE Main 2024 (Online) 30th January Morning Shift
29

Identify product A and product B :

JEE Main 2024 (Online) 29th January Morning Shift Chemistry - Hydrocarbons Question 34 English

JEE Main 2024 (Online) 29th January Morning Shift
30

The final product A formed in the following multistep reaction sequence is

JEE Main 2024 (Online) 29th January Morning Shift Chemistry - Hydrocarbons Question 32 English

JEE Main 2024 (Online) 29th January Morning Shift
31

The final product A, formed in the following reaction sequence is:

JEE Main 2024 (Online) 27th January Evening Shift Chemistry - Hydrocarbons Question 36 English

JEE Main 2024 (Online) 27th January Evening Shift
32
The product formed in the following multistep reaction is :

JEE Main 2023 (Online) 15th April Morning Shift Chemistry - Hydrocarbons Question 49 English
JEE Main 2023 (Online) 15th April Morning Shift
33

JEE Main 2023 (Online) 13th April Morning Shift Chemistry - Hydrocarbons Question 48 English

In the above reaction, left hand side and right hand side rings are named as '$$\mathrm{A}$$' and 'B' respectively. They undergo ring expansion. The correct statement for this process is:

JEE Main 2023 (Online) 13th April Morning Shift
34

The major product formed in the following reaction is

JEE Main 2023 (Online) 11th April Evening Shift Chemistry - Hydrocarbons Question 45 English 1JEE Main 2023 (Online) 11th April Evening Shift Chemistry - Hydrocarbons Question 45 English 2

Choose the correct answer from the options given below :

JEE Main 2023 (Online) 11th April Evening Shift
35

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

JEE Main 2023 (Online) 11th April Evening Shift Chemistry - Hydrocarbons Question 46 English

In the light of the above statements, choose the correct answer from the options given below:

JEE Main 2023 (Online) 11th April Evening Shift
36

Find out the major product from the following reaction.

JEE Main 2023 (Online) 6th April Evening Shift Chemistry - Hydrocarbons Question 40 English

JEE Main 2023 (Online) 6th April Evening Shift
37

In the following reaction, 'B' is

JEE Main 2023 (Online) 6th April Evening Shift Chemistry - Hydrocarbons Question 41 English

JEE Main 2023 (Online) 6th April Evening Shift
38

'$$\mathrm{X}$$' is :

JEE Main 2023 (Online) 1st February Evening Shift Chemistry - Hydrocarbons Question 60 English

JEE Main 2023 (Online) 1st February Evening Shift
39

But-2-yne is reacted separately with one mole of Hydrogen as shown below :

JEE Main 2023 (Online) 1st February Morning Shift Chemistry - Hydrocarbons Question 58 English

A. A is more soluble than B.

B. The boiling point & melting point of A are higher and lower than B respectively.

C. A is more polar than B because dipole moment of A is zero.

D. $$\mathrm{Br_2}$$ adds easily to B than A.

Identify the incorrect statements from the options given below :

JEE Main 2023 (Online) 1st February Morning Shift
40
A hydrocarbon ' $\mathrm{X}$ ' with formula $\mathrm{C}_{6} \mathrm{H}_{8}$ uses two moles of $\mathrm{H}_{2}$ on catalytic hydrogenation of its one mole. On ozonolysis, ' $\mathrm{X}$ ' yields two moles of methane dicarbaldehyde. The hydrocarbon ' $\mathrm{X}$ ' is:
JEE Main 2023 (Online) 31st January Evening Shift
41

Choose the correct set of reagents for the following conversion.

trans $$\left(\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}\right) \rightarrow \operatorname{cis}\left(\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}\right)$$

JEE Main 2023 (Online) 31st January Morning Shift
42

The major products 'A' and 'B', respectively, are

JEE Main 2023 (Online) 30th January Morning Shift Chemistry - Hydrocarbons Question 56 English

JEE Main 2023 (Online) 30th January Morning Shift
43

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

JEE Main 2023 (Online) 29th January Evening Shift
44

JEE Main 2023 (Online) 25th January Morning Shift Chemistry - Hydrocarbons Question 53 English

The correct sequence of reagents for the preparation of Q and R is :

JEE Main 2023 (Online) 25th January Morning Shift
45

Find out the major products from the following reactions.

JEE Main 2023 (Online) 24th January Evening Shift Chemistry - Hydrocarbons Question 52 English

JEE Main 2023 (Online) 24th January Evening Shift
46

In the following given reaction, 'A' is

JEE Main 2023 (Online) 24th January Morning Shift Chemistry - Hydrocarbons Question 50 English

JEE Main 2023 (Online) 24th January Morning Shift
47

$$ \stackrel{\bullet}{\mathrm{Cl}}+\mathrm{CH}_{4} \rightarrow \mathrm{A}+\mathrm{B} $$

A and B in the above atmospheric reaction step are :

JEE Main 2022 (Online) 26th July Morning Shift
48

Major product of the following reaction is

JEE Main 2022 (Online) 25th July Evening Shift Chemistry - Hydrocarbons Question 62 English

JEE Main 2022 (Online) 25th July Evening Shift
49

A compound ‘$$\mathrm{A}$$’ on reaction with ‘$$\mathrm{X}$$’ and ‘$$\mathrm{Y}$$’ produces the same major product but different by product '$$a$$' and '$$b^{\prime}$$. Oxidation of '$$a$$' gives a substance produced by ants.

JEE Main 2022 (Online) 25th July Morning Shift Chemistry - Hydrocarbons Question 63 English

'X' and 'Y' respectively are

JEE Main 2022 (Online) 25th July Morning Shift
50

Two isomers 'A' and 'B' with molecular formula C4H8 give different products on oxidation with KMnO4 in acidic medium. Isomer 'A' on reaction with KMnO4/H+ results in effervescence of a gas and gives ketone. The compound 'A' is

JEE Main 2022 (Online) 29th June Morning Shift
51

What will be the major product of following sequence of reactions?

JEE Main 2022 (Online) 27th June Evening Shift Chemistry - Hydrocarbons Question 69 English

JEE Main 2022 (Online) 27th June Evening Shift
52

Product 'A' of following sequence of reactions is

JEE Main 2022 (Online) 27th June Evening Shift Chemistry - Hydrocarbons Question 70 English

JEE Main 2022 (Online) 27th June Evening Shift
53

The major product in the following reaction

JEE Main 2022 (Online) 26th June Evening Shift Chemistry - Hydrocarbons Question 68 English

JEE Main 2022 (Online) 26th June Evening Shift
54

The product formed in the following reaction.

JEE Main 2022 (Online) 25th June Morning Shift Chemistry - Hydrocarbons Question 67 English

JEE Main 2022 (Online) 25th June Morning Shift
55

Given below are two statements :

Statement I : The presence of weaker $$\pi$$-bonds make alkenes less stable than alkanes.

Statement II : The strength of the double bond is greater than that of carbon-carbon single bond.

In the light of the above statements, choose the correct answer from the options given below :

JEE Main 2022 (Online) 24th June Evening Shift
56

Which of the following reagents / reactions will convert 'A' to 'B' ?

JEE Main 2022 (Online) 24th June Evening Shift Chemistry - Hydrocarbons Question 65 English

JEE Main 2022 (Online) 24th June Evening Shift
57
The stereoisomers that are formed by electrophilic addition of bromine to trans-but-2-ene is/are :
JEE Main 2021 (Online) 1st September Evening Shift
58
For the following sequence of reactions, the correct products are :

JEE Main 2021 (Online) 31st August Evening Shift Chemistry - Hydrocarbons Question 73 English
JEE Main 2021 (Online) 31st August Evening Shift
59
The correct sequence of correct reagents for the following transformation is :

JEE Main 2021 (Online) 27th July Evening Shift Chemistry - Hydrocarbons Question 74 English
JEE Main 2021 (Online) 27th July Evening Shift
60
Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible reaction :

CH4 + I2 $$\mathrel{\mathop{\kern0pt\rightleftharpoons} \limits_{{\mathop{\rm Re}\nolimits} versible}^{hv}} $$ CH3 $$-$$ I + HI
JEE Main 2021 (Online) 27th July Morning Shift
61
An organic compound 'A' C4H8 on treatment with KMnO4/H+ yields compound 'B' C3H6O.

Compound 'A' also yields compound 'B' an ozonolysis. Compound 'A' is :
JEE Main 2021 (Online) 25th July Morning Shift
62
Metallic sodium does not react normally with :
JEE Main 2021 (Online) 20th July Evening Shift
63
Benzene on nitration gives nitrobenzene in presence of HNO3 and H2SO4 mixture, where :
JEE Main 2021 (Online) 20th July Evening Shift
64
JEE Main 2021 (Online) 20th July Evening Shift Chemistry - Hydrocarbons Question 81 English
Major product P of above reaction, is :
JEE Main 2021 (Online) 20th July Evening Shift
65
JEE Main 2021 (Online) 20th July Morning Shift Chemistry - Hydrocarbons Question 82 English
For above chemical reactions, identify the correct statement from the following :
JEE Main 2021 (Online) 20th July Morning Shift
66
Match List - I with List - II :

List - I (Chemicals)

(a) Alcoholic potassium hydroxide

(b) Pd/BaSO4

(c) BHC (Benzene hexachloride)

(d) Polyacetylene

List - II (Use / Preparation / Constituent)

(i) Electrodes in batteries

(ii) Obtained by addition reaction

(iii) Used for $$\beta$$ - elimination reaction

(iv) Lindlar's catalyst

Choose the most appropriate match :
JEE Main 2021 (Online) 18th March Morning Shift
67
Choose the correct statement regarding the formation of carbocations A and B given.

JEE Main 2021 (Online) 17th March Evening Shift Chemistry - Hydrocarbons Question 84 English
JEE Main 2021 (Online) 17th March Evening Shift
68
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 :
JEE Main 2021 (Online) 17th March Evening Shift
69
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 :
JEE Main 2021 (Online) 16th March Evening Shift
70
Which of the following is Lindlar catalyst?
JEE Main 2021 (Online) 16th March Morning Shift
71
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 :
JEE Main 2021 (Online) 26th February Evening Shift
72
The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is :
JEE Main 2021 (Online) 25th February Evening Shift
73
The major product of the following reaction is :

JEE Main 2021 (Online) 25th February Evening Shift Chemistry - Hydrocarbons Question 89 English
JEE Main 2021 (Online) 25th February Evening Shift
74
Identify A in the given chemical reaction.

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Hydrocarbons Question 92 English
JEE Main 2021 (Online) 25th February Morning Shift
75
The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is :

JEE Main 2021 (Online) 24th February Evening Shift Chemistry - Hydrocarbons Question 93 English
JEE Main 2021 (Online) 24th February Evening Shift
76
Identify products A and B.

JEE Main 2021 (Online) 24th February Morning Shift Chemistry - Hydrocarbons Question 94 English
JEE Main 2021 (Online) 24th February Morning Shift
77
The major product obtained from the following reaction is : JEE Main 2020 (Online) 6th September Morning Slot Chemistry - Hydrocarbons Question 95 English
JEE Main 2020 (Online) 6th September Morning Slot
78
The major product of the following reaction is : JEE Main 2020 (Online) 6th September Morning Slot Chemistry - Hydrocarbons Question 96 English
JEE Main 2020 (Online) 6th September Morning Slot
79
Which of the following compounds produces an optically inactive compound on hydrogenation?
JEE Main 2020 (Online) 3rd September Morning Slot
80
The major product in the following reaction is : JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Hydrocarbons Question 100 English
JEE Main 2020 (Online) 2nd September Morning Slot
81
The correct order of heat of combustion for following alkadienes is :
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Hydrocarbons Question 102 English 1 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Hydrocarbons Question 102 English 2 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Hydrocarbons Question 102 English 3
JEE Main 2020 (Online) 9th January Morning Slot
82
The major product (Y) in the following reactions is : JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Hydrocarbons Question 101 English
JEE Main 2020 (Online) 9th January Morning Slot
83
The major product in the following reaction is: JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Hydrocarbons Question 104 English
JEE Main 2020 (Online) 8th January Evening Slot
84
The major product [B] in the following sequence of reactions is :-

JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Hydrocarbons Question 105 English
JEE Main 2020 (Online) 8th January Evening Slot
85
In the following reactions sequence, structure of A and B respectively will be :
JEE Main 2020 (Online) 7th January Evening Slot Chemistry - Hydrocarbons Question 106 English
JEE Main 2020 (Online) 7th January Evening Slot
86
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 ?
JEE Main 2020 (Online) 7th January Morning Slot
87
Consider the following reactions :
JEE Main 2019 (Online) 12th April Evening Slot Chemistry - Hydrocarbons Question 108 English
'A' is :
JEE Main 2019 (Online) 12th April Evening Slot
88
In the following skew conformation of ethane, H'–C–C–H'' dihedral angle is : JEE Main 2019 (Online) 12th April Evening Slot Chemistry - Hydrocarbons Question 109 English
JEE Main 2019 (Online) 12th April Evening Slot
89
The major product of the following addition reaction is :
H3C–CH=CH2 $$\buildrel {C{l_2}/{H_2}O} \over \longrightarrow $$
JEE Main 2019 (Online) 12th April Morning Slot
90
But-2-ene on reaction with alkaline KMnO4 at elevated temperature followed by acidification will give :
JEE Main 2019 (Online) 12th April Morning Slot
91
Increasing order of reactivity of the following compounds for SN1 substitution is: JEE Main 2019 (Online) 9th April Evening Slot Chemistry - Hydrocarbons Question 113 English
JEE Main 2019 (Online) 9th April Evening Slot
92
Which of the following potential energy (PE) diagrams represents the SN1 reaction?
JEE Main 2019 (Online) 9th April Evening Slot
93
The major product of the following reaction is :
JEE Main 2019 (Online) 9th April Morning Slot Chemistry - Hydrocarbons Question 114 English
JEE Main 2019 (Online) 9th April Morning Slot
94
The major product of the following reaction is : JEE Main 2019 (Online) 9th April Morning Slot Chemistry - Hydrocarbons Question 115 English
JEE Main 2019 (Online) 9th April Morning Slot
95
Polysubstitution is a major drawback in:
JEE Main 2019 (Online) 8th April Evening Slot
96
The major product of the following reaction is –

JEE Main 2019 (Online) 12th January Evening Slot Chemistry - Hydrocarbons Question 117 English
JEE Main 2019 (Online) 12th January Evening Slot
97
The major product of the following reaction is :

JEE Main 2019 (Online) 12th January Evening Slot Chemistry - Hydrocarbons Question 118 English
JEE Main 2019 (Online) 12th January Evening Slot
98
The major product of the following reaction is –

JEE Main 2019 (Online) 12th January Evening Slot Chemistry - Hydrocarbons Question 119 English
JEE Main 2019 (Online) 12th January Evening Slot
99
The major product of the following reaction is

JEE Main 2019 (Online) 12th January Morning Slot Chemistry - Hydrocarbons Question 120 English
JEE Main 2019 (Online) 12th January Morning Slot
100
The correct order for acid strength of compounds :

CH $$ \equiv $$ CH, CH3–C $$ \equiv $$ CH and CH2 = CH2 is as follows
JEE Main 2019 (Online) 12th January Morning Slot
101
Which compound (s) out of the following is/are not aromatic ?

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Hydrocarbons Question 122 English
JEE Main 2019 (Online) 11th January Morning Slot
102
The major product of the following reaction is :

JEE Main 2019 (Online) 10th January Morning Slot Chemistry - Hydrocarbons Question 123 English
JEE Main 2019 (Online) 10th January Morning Slot
103
The major product of the following reaction is

JEE Main 2019 (Online) 10th January Morning Slot Chemistry - Hydrocarbons Question 124 English
JEE Main 2019 (Online) 10th January Morning Slot
104
The major product of the following reaction is :

JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Hydrocarbons Question 128 English
JEE Main 2018 (Online) 16th April Morning Slot
105
The trans-alkenes are formed by the reduction of alkynes with
JEE Main 2018 (Offline)
106
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 ?
JEE Main 2018 (Online) 15th April Evening Slot
107
The major product formed in the following reaction is :
JEE Main 2018 (Online) 15th April Evening Slot Chemistry - Hydrocarbons Question 129 English
JEE Main 2018 (Online) 15th April Evening Slot
108
Which of the following will most readily give the dehydrohalogenation product ?
JEE Main 2018 (Online) 15th April Morning Slot
109
The major product of the following reaction is :

JEE Main 2017 (Online) 9th April Morning Slot Chemistry - Hydrocarbons Question 127 English
JEE Main 2017 (Online) 9th April Morning Slot
110
Consider the reaction sequence below :

JEE Main 2016 (Online) 10th April Morning Slot Chemistry - Hydrocarbons Question 125 English
X is:
JEE Main 2016 (Online) 10th April Morning Slot
111
5 L of an alkane requires 25 L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is :
JEE Main 2016 (Online) 9th April Morning Slot
112
At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% O2 by volume for complete combustion. After combustion the gases occupy 345 mL. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:
JEE Main 2016 (Offline)
113
The reaction of propene with HOCl (Cl2 + H2O) proceeds through the intermediate:
JEE Main 2016 (Offline)
114
Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide ?
AIEEE 2012
115
2–Hexyne gives trans–2–Hexene on treatment with :
AIEEE 2012
116
Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :
AIEEE 2011
117
The main product of the following reaction is

$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $${C_6}{H_5}C{H_2}CH\left( {OH} \right)CH{\left( {C{H_3}} \right)_2}\buildrel {conc.{H_2}S{O_4}} \over \longrightarrow \,?$$
AIEEE 2010
118
The treatment of $$C{H_3}MgX\,\,$$ with $$C{H_3}C \equiv C - H$$ produces
AIEEE 2008
119
The hydrocarbon which can react with sodium in liquid ammonia is
AIEEE 2008
120
In the following sequence of reactions, the alkene affords the compound ‘B’
CH3 - CH = CH - CH3 $$\buildrel {{O_3}} \over \longrightarrow $$ A $$\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Zn}^{H{}_2O}} $$ B
The compound B is
AIEEE 2008
121
Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains
AIEEE 2008
122
Which of the following reactions will yield 2, 2-dibromopropane?
AIEEE 2007
123
The reaction of toluene with Cl2 in presence of FeCl3 gives predominantly
AIEEE 2007
124
AIEEE 2006 Chemistry - Hydrocarbons Question 134 English

The alkene formed as a major product in the above elimination reaction is
AIEEE 2006
125
Reaction of one molecule of HBr with one molecule of 1,3-butadiene at 40oC gives predominantly
AIEEE 2005
126
Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is
AIEEE 2005
127
2 methylbutane on reacting with bromine in the presence of sunlight gives mainly
AIEEE 2005
128
Which types of isomerism is shown by 2,3-dichlorobutane?
AIEEE 2005
129
Which one of the following has the minimum boiling point?
AIEEE 2004
130
Butene-1 may be converted to butane by reaction with
AIEEE 2003
131
On mixing a certain alkane with chlorine and irradiating it with ultravioletlight, it forms only one monochloroalkane. This alkane could be
AIEEE 2003
132
Which of these will not react with acetylene ?
AIEEE 2002
133
What is the product when acetylene reacts with hypochlorous acid ?
AIEEE 2002
134
Acetylene does not react with :
AIEEE 2002

Numerical

1

Isomeric hydrocarbons → negative Baeyer’s test

(Molecular formula C9H12)

The total number of isomers from above with four different non-aliphatic substitution sites is -

JEE Main 2025 (Online) 29th January Evening Shift
2

The sum of sigma (σ) and pi (π) bonds in Hex-1,3-dien-5-yne is ________.

JEE Main 2025 (Online) 29th January Morning Shift
3

The compound with molecular formula $\mathrm{C}_6 \mathrm{H}_6$, which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has _________ $\pi$ electrons.

JEE Main 2025 (Online) 22nd January Evening Shift
4

Major product B of the following reaction has ________ $$\pi$$-bond.

JEE Main 2024 (Online) 8th April Morning Shift Chemistry - Hydrocarbons Question 23 English

JEE Main 2024 (Online) 8th April Morning Shift
5

The major product of the following reaction is P.

$$\mathrm{CH}_3 \mathrm{C}\equiv\mathrm{C}-\mathrm{CH}_3$$ $$\xrightarrow[\substack{\text { (ii) dil. } \mathrm{KMnO}_4 \\ 273 \mathrm{~K}}]{\text { (i) } \mathrm{Na} \text { /liq. } \mathrm{NH}_3}$$ 'P'

Number of oxygen atoms present in product '$$\mathrm{P}$$' is _______. (nearest integer)

JEE Main 2024 (Online) 6th April Morning Shift
6

The major products from the following reaction sequence are product A and product B.

JEE Main 2024 (Online) 6th April Morning Shift Chemistry - Hydrocarbons Question 19 English

The total sum of $$\pi$$ electrons in product A and product B are __________ (nearest integer)

JEE Main 2024 (Online) 6th April Morning Shift
7

JEE Main 2024 (Online) 29th January Morning Shift Chemistry - Hydrocarbons Question 33 English

Consider the given reaction. The total number of oxygen atom/s present per molecule of the product $$(\mathrm{P})$$ is _________.

JEE Main 2024 (Online) 29th January Morning Shift
8

For the given reaction

JEE Main 2023 (Online) 13th April Morning Shift Chemistry - Hydrocarbons Question 47 English

The total number of possible products formed by tertiary carbocation of A is ____________.

JEE Main 2023 (Online) 13th April Morning Shift
9

The number of possible isomeric products formed when 3-chloro-1-butene reacts with $$\mathrm{HCl}$$ through carbocation formation is __________.

JEE Main 2023 (Online) 11th April Evening Shift
10

Molar mass of the hydrocarbon (X) which on ozonolysis consumes one mole of $$\mathrm{O}_{3}$$ per mole of $$(\mathrm{X})$$ and gives one mole each of ethanal and propanone is _________ $$\mathrm{g}~ \mathrm{mol}^{-1}$$

(Molar mass of $$\mathrm{C}: 12 \mathrm{~g} \mathrm{~mol}^{-1}, \mathrm{H}: 1 \mathrm{~g} \mathrm{~mol}^{-1}$$ )

JEE Main 2023 (Online) 8th April Morning Shift
11

Number of bromo derivatives obtained on treating ethane with excess of $$\mathrm{Br}_{2}$$ in diffused sunlight is ___________

JEE Main 2023 (Online) 6th April Morning Shift
12

17 mg of a hydrocarbon (M.F. $$\mathrm{C_{10}H_{16}}$$) takes up 8.40 mL of the H$$_2$$ gas measured at 0$$^\circ$$C and 760 mm of Hg. Ozonolysis of the same hydrocarbon yields

JEE Main 2023 (Online) 29th January Morning Shift Chemistry - Hydrocarbons Question 54 English

The number of double bond/s present in the hydrocarbon is ___________.

JEE Main 2023 (Online) 29th January Morning Shift
13

Maximum number of isomeric monochloro derivatives which can be obtained from 2,2,5,5-tetramethylhexane by chlorination is _____________

JEE Main 2023 (Online) 24th January Evening Shift
14

The major product 'A' of the following given reaction has _____________ sp2 hybridized carbon atoms.

JEE Main 2022 (Online) 24th June Morning Shift Chemistry - Hydrocarbons Question 64 English

JEE Main 2022 (Online) 24th June Morning Shift
15
JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Hydrocarbons Question 76 English
Consider the above chemical reaction. The total number of stereoisomers possible for Product 'P' is _____________.
JEE Main 2021 (Online) 25th July Evening Shift
16
The number of sigma bonds in

JEE Main 2021 (Online) 25th July Morning Shift Chemistry - Hydrocarbons Question 77 English
is _______________.
JEE Main 2021 (Online) 25th July Morning Shift
17
Consider the following chemical reaction.

JEE Main 2021 (Online) 25th February Morning Shift Chemistry - Hydrocarbons Question 91 English
The number of sp2 hybridized carbon atom(s) present in the product is ________.
JEE Main 2021 (Online) 25th February Morning Shift
18
The minimum number of moles of O2 required for complete combustion of 1 mole of propane and 2 moles of butane is _____.
JEE Main 2020 (Online) 5th September Morning Slot
19
The total number of monohalogenated organic products in the following (including stereoisomers) reaction is ______. JEE Main 2020 (Online) 3rd September Morning Slot Chemistry - Hydrocarbons Question 98 English
JEE Main 2020 (Online) 3rd September Morning Slot
20
In the following sequence of reactions the maximum number of atoms present in molecule 'C' in one plane is _________. JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Hydrocarbons Question 103 English (A is a lowest molecular weight alkyne)
JEE Main 2020 (Online) 8th January Evening Slot
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