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Hydrocarbons — JEE Main & Advanced Chemistry PYQs

509 previous year questions from Hydrocarbons with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

509 questionsChemistrySolutions on every page
1

In the following reaction sequence, Q , R , S and T are the major products. The correct statement(s) about Q , R , S and T is(are)

JEE Advanced 2026 Solution View → 2

Treatment of buta-1,3-diyne with NaNH ₂ ( 2 equivalents), followed by reaction with excess of trans - CH ₃ -CH=CH-CH ₂ -Br gives X as the major product. The maximum number of carbo

JEE Advanced 2026 Solution View → 3

The List-II contains products obtained from the reaction of compounds in List-I with O ₃ /Zn- H ₂ O followed by cyclization (via more stable enolate) in the presence of aqueous NaO

JEE Advanced 2026 Solution View → 4

Natural rubber on complete ozonolysis ( O ₃ /Zn- H ₂ O ) gives compound X as the major product. X gives positive iodoform and Tollen's tests. X on heating with aqueous NaOH gives Y

JEE Advanced 2026 Solution View → 5

An optically active alkyl bromide C₄ H₉ Br, reacts with ethanolic KOH to form major compound [A] which reacts with bromine to give compound [B]. Compound [B] reacts with ethanolic

JEE Main 2026 Solution View → 6

An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with Cl₂ /h , (Y) gives only one monochlorinated product (Z) . The total number of primary carb

JEE Main 2026 Solution View → 7

R_f value for 2 -methylpropene in a solvent system (Ethyl acetate + ether) is 0.42 . 2 -methylpropene is treated with dilute H ₂ SO ₄ to give major organic product (X). R_f value f

JEE Main 2026 Solution View → 8

Given below are two statements: Statement I: Methane can be prepared by decarboxylation of sodium ethanoate, Kolbe's electrolysis of sodium acetate and reaction of CH ₃ MgBr with w

JEE Main 2026 Solution View → 9

Given below are two statements: Statement I: 3 -phenylpropene reacts with HBr and gives secondary alkyl bromide having a chiral carbon atom as the major product. Statement II: Aryl

JEE Main 2026 Solution View → 10

IUPAC name of the some alkenes are given below. Find out the correct stability order. A. 2-Methylbut-2-ene B. cis-But-2-ene C. 2,3-Dimethylbut-2-ene D. Prop-1-ene Choose the correc

JEE Main 2026 Solution View → 11

"P" is a hydrocarbon of molecular formula: C ₈ H ₁₄ . On ozonolysis, "P" forms "Q". "Q" on treatment with alkali under reflux condition produces "R", which on treatment with I ₂ /N

JEE Main 2026 Solution View → 12

For the following Friedel Craft's alkylation reaction, which of the statements are correct? A. Major product is n-propyl benzene. B. iso-propyl carbocation intermediate is also gen

JEE Main 2026 Solution View → 13

Compound (X) [styrene] is subjected to the sequence of reactions as shown above: (i) Br₂/CHCl₃ (ii) NaNH₂ excess (iii) CH₃I (iv) H₂ , Na/NH₃(l) , giving Major Product (Y). Molar ma

JEE Main 2026 Solution View → 14

An alkene (X) on ozonolysis followed by reduction gives following products: H-CHO ( 2 moles), H-CO-CO-CHO , CH₃-CO-CO-CH₃ . The alkene (X) is:

JEE Main 2026 Solution View → 15

Consider the following sequence of reactions to give the major product (X) P g of the major product (X) formed is reacted with NaHCO₃ solution to liberate a gas which occupied 11.2

JEE Main 2026 Solution View → 16

The compound (X) on (i) on heating in the presence of anhydrous AlCl₃ and HCl gas gives 2,4 -dimethyl pentane (ii) aromatization gives toluene and (iii) cyclisation gives methyl cy

JEE Main 2026 Solution View → 17

Identify compounds A and E in the following reaction sequence.

JEE Main 2026 Solution View → 18

For the given molecule, " x ", the preferred site for the attack of the electrophile is :

JEE Main 2026 Solution View → 19

Consider the isomers of hydrocarbon with molecular formula C₅H₁₀ . These isomers do not decolourise KMnO₄ solution. These isomers are subjected to chlorination with chlorine in pre

JEE Main 2026 Solution View → 20

One mole of an alkane (x) requires 8 mole oxygen for complete combustion. Sum of number of carbon and hydrogen atoms in the alkane (x) is _______.

JEE Main 2026 Solution View → 21

Identify the correct statements : The presence of - NO ₂ group in benzene ring A. activates the ring towards electrophilic substitutions. B. deactivates the ring towards electrophi

JEE Main 2026 Solution View → 22

Ph - CH = CH ₂ [ HBr ] ( PhCOO )₂ Product Consider the above reaction A. The reaction proceeds through a more stable radical intermediate. B. The role of peroxide is to generate H

JEE Main 2026 Solution View → 23

Method used for separation of mixture of products (B and C) obtained in the following reaction is

JEE Main 2026 Solution View → 24

Given below are two statements for the following reaction sequence. Statement I: Compound ' Z ' will give yellow precipitate with NaOI. Statement II: Compound ' Q ' has two differe

JEE Main 2026 Solution View → 25

Consider the following reaction of benzene. In compound (Q), the percentage of oxygen is _ _ _ _ %. (Nearest integer)

JEE Main 2026 Solution View → 26

Consider the following compounds Arrange these compounds in the increasing order of reactivity with nitrating mixture.

JEE Main 2026 Solution View → 27

But-2-yne and hydrogen (one mole each) are separately treated with (i) Pd / C and (ii) Na / liq . NH ₃ to give the products X and Y respectively. Identify the incorrect statements.

JEE Main 2026 Solution View → 28

Consider the following reaction : The product Y formed is :

JEE Main 2026 Solution View → 29

Given below are two statements: Statement I : Benzene is nitrated to give nitrobenzene, which on further treatment with CH ₃ COCl / AlCl ₃ will give Statement II : - NO ₂ group is

JEE Main 2026 Solution View → 30

The cycloalkene ( X ) on bromination consumes one mole of bromine per mole of ( X ) and gives the product ( Y ) in which C : Br ratio is 3:1. The percentage of bromine in the produ

JEE Main 2026 Solution View → 31

Identify A in the following reaction.

JEE Main 2026 Solution View → 32

The number of optically active products obtained from the complete ozonolysis of the given compound is :

JEE Main 2025 Solution View → 33

Identify the structure of the final product (D) in the following sequence of the reactions : Total number of sp ^2 hybridised carbon atoms in product D is.

JEE Main 2025 Solution View → 34

Given below are two statements : Statement I : Ozonolysis followed by treatment with Zn , H ₂ O of cis-2-butene gives ethanal. Statement II : The production obtained by ozonolysis

JEE Main 2025 Solution View → 35

Consider the following molecule (X). The structure of X is

JEE Main 2025 Solution View → 36

Benzene is treated with oleum to produce compound (X) which when further heated with molten sodium hydroxide followed by acidification produces compound (Y).The compound Y is treat

JEE Main 2025 Solution View → 37

X g of nitrobenzene on nitration gave 4.2 g of m-dinitrobenzene. X =______ g. (nearest integer) [Given : molar mass (in g mol ⁻¹ ) C : 12, H : 1 , O : 16, ~N : 14]

JEE Main 2025 Solution View → 38

In the following series of reactions identify the major products A & B respectively.

JEE Main 2025 Solution View → 39

0.5 g of an organic compound on combustion gave 1.46 g of CO ₂ and 0.9 g of H ₂ O . The percentage of carbon in the compound is _______. (Nearest integer) [Given : Molar mass (in g

JEE Main 2025 Solution View → 40

Which compound would give 3-methyl-6oxoheptanal upon ozonolysis?

JEE Main 2025 Solution View → 41

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

JEE Main 2025 Solution View → 42

Which one of the following reaction sequences will give an azo dye?

JEE Main 2025 Solution View → 43

Given below are two statements : Statement (I) : On nitration of m-xylene with HNO ₃, H ₂ SO ₄ followed by oxidation, 4-nitrobenzene-1,3-dicarboxylic acid is obtained as the major

JEE Main 2025 Solution View → 44

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

JEE Main 2025 Solution View → 45

Isomeric hydrocarbons negative Baeyer's test (Molecular formula C ₉ H ₁₂ ) The total number of isomers from above with four different non-aliphatic substitution sites is -

JEE Main 2025 Solution View → 46

In the following substitution reaction: product ( ^ P ^ ) formed is :

JEE Main 2025 Solution View → 47

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

JEE Main 2025 Solution View → 48

The product B formed in the following reaction sequence is :

JEE Main 2025 Solution View → 49

The major product of the following reaction is :

JEE Main 2025 Solution View → 50

The product (A) formed in the following reaction sequence is

JEE Main 2025 Solution View → 51

Following are the four molecules "P", "Q", "R" and "S". Which one among the four molecules will react with H - Br _ ( aq ) at the fastest rate?

JEE Main 2025 Solution View → 52

Match the List-I with List-II Choose the correct answer from the options given below:

JEE Main 2025 Solution View → 53

The alkane from below having two secondary hydrogens is :

JEE Main 2025 Solution View → 54

Given below are two statements : Statement I : One mole of propyne reacts with excess of sodium to liberate half a mole of H ₂ gas. Statement II : Four g of propyne reacts with NaN

JEE Main 2025 Solution View → 55

The option(s) with correct sequence of reagents for the conversion of P to Q is(are) :

JEE Advanced 2024 Solution View → 56

Number of compounds from the following which cannot undergo Friedel-Crafts reactions is: ________. toluene, nitrobenzene, xylene, cumene, aniline, chlorobenzene, (m )-nitroaniline,

JEE Main 2024 Solution View → 57

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

JEE Main 2024 Solution View → 58

The major product of the following reaction is (P ). ( CH ₃ C = C - CH ₃ [ (ii) dil. KMnO ₄ 273 ~K ] (i) Na / ing NH ₃ '^ ) Number of oxygen atoms present in product ' ( P ) ' is _

JEE Main 2024 Solution View → 59

Identify (A ) and (B ) in the given chemical reaction sequence :

JEE Main 2024 Solution View → 60

Consider the given chemical reaction : Product " ( A ) " is :

JEE Main 2024 Solution View → 61

Given below are two statements: Statement I : Nitration of benzene involves the following step - Statement II : Use of Lewis base promotes the electrophilic substitution of benzene

JEE Main 2024 Solution View → 62

In the above chemical reaction sequence " ( A ) " and " ( B ) " respectively are

JEE Main 2024 Solution View → 63

Identify (B) and (C) and how are (A) and (C) related ?

JEE Main 2024 Solution View → 64

Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2 -methylbutane is ______.

JEE Main 2024 Solution View → 65

In the given reactions identify A and B .

JEE Main 2024 Solution View → 66

Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is

JEE Main 2024 Solution View → 67

Which of the following compound will most easily be attacked by an electrophile?

JEE Main 2024 Solution View → 68

Number of isomeric products formed by monochlorination of 2 -methylbutane in presence of sunlight is _______.

JEE Main 2024 Solution View → 69

Major product of the following reaction is:

JEE Main 2024 Solution View → 70

Identify A and B in the following reaction sequence.

JEE Main 2024 Solution View → 71

Number of alkanes obtained on electrolysis of a mixture of CH 3 COONa and C 2 H 5 COONa is_____.

JEE Main 2024 Solution View → 72

The product (C) in the below mentioned reaction is: CH 3 - CH 2 - CH 2 - Br → ∆ KOH alc A → HBr B → KOH aq ∆ C

JEE Main 2024 Solution View → 73

Product A and B formed in the following set of reactions are:

JEE Main 2024 Solution View → 74

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

JEE Main 2024 Solution View → 75

In the given reactions identify the reagent A and reagent B

JEE Main 2024 Solution View → 76

Consider the given reaction. The total number of oxygen atoms present per molecule of the product ( P ) is _________.

JEE Main 2024 Solution View → 77

Identify product A and product B

JEE Main 2024 Solution View → 78

The major product(P) in the following reaction is

JEE Main 2024 Solution View → 79

The arenium ion which is not involved in the bromination of Aniline is

JEE Main 2024 Solution View → 80

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

JEE Main 2024 Solution View → 81

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

JEE Main 2024 Solution View → 82

3 - Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible stereoisomers for ' A ' is ________.

JEE Main 2024 Solution View → 83

The product formed in the following multistep reaction is:

JEE Main 2023 Solution View → 84

In the following reaction ‘ X ’ is CH 3 CH 2 4 CH 3 → HCl △ Anhy . AlCl 3 X major product

JEE Main 2023 Solution View → 85

2 - hexene → ii H 2 O i O 3 Products The two products formed in above reaction are

JEE Main 2023 Solution View → 86

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : can be subjected to Wolff-Kishner reduction to give Reason R :

JEE Main 2023 Solution View → 87

The major product formed in the following reaction is A. B. C. D. choose the correct answer from the options Given below:

JEE Main 2023 Solution View → 88

Arrange the following compounds in increasing order of rate of aromatic electrophilic substitution reaction.

JEE Main 2023 Solution View → 89

The major product ' P ' formed in the given reaction is

JEE Main 2023 Solution View → 90

Molar mass of the hydrocarbon (X) which on ozonolysis consumes one mole of O 3 per mole of (X) and gives one mole each of ethanal and propanone is ______ g mol –1 (Molar mass

JEE Main 2023 Solution View → 91

Number of bromo derivatives obtained on treating ethane with excess of Br 2 in diffused sunlight is _ _ _ _ _ _ _ _ _

JEE Main 2023 Solution View → 92

‘ X ’ is:

JEE Main 2023 Solution View → 93

But- 2 -yne is reacted separately with one mole of Hydrogen as shown below: B ¯ ← liq   NH 3 Na CH 3 - C ≡ + H 2 C - CH 3 → ∆ Pd / C A ¯ Iden

JEE Main 2023 Solution View → 94

A hydrocarbon 'X' with formula C 6 H 8 uses two moles of H 2 on catalystic hydrogenation of its one mole. On ozonolysis, 'X' yields two moles of methane dicarbaldeh

JEE Main 2023 Solution View → 95

Choose the correct set of reagents for the following conversion trans Ph - CH = CH - CH 3 → cis Ph - CH = CH - CH 3

JEE Main 2023 Solution View → 96

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: can be easily reduced using Zn - Hg / HCl to Reason R: Zn - Hg /

JEE Main 2023 Solution View → 97

The major products ‘ A ’ and ‘ B ’, respectively, are

JEE Main 2023 Solution View → 98

When a hydrocarbon A undergoes combustion in the presence of air, it requires 9 . 5 equivalents of oxygen and produces 3 equivalents of water. What is the molecular formula of A ?

JEE Main 2023 Solution View → 99

When 0 . 01 mol of an organic compound containing 60 % carbon was burnt completely, 4 . 4 g of CO 2 was produced. The molar mass of compound is _____ gmol - 1 (Nearest integer)

JEE Main 2023 Solution View → 100

17 mg of a hydrocarbon (M.F. C 10 H 16 ) takes up 8 . 40 mL of the H 2 gas measured at 0 ° C and 760 mm of Hg . Ozonolysis of the same hydrocarbon yields CH 3 - C | | O - CH 3

JEE Main 2023 Solution View → 101

The compound which will have the lowest rate towards nucleophilic aromatic substitution on treatment with OH – is

JEE Main 2023 Solution View → 102

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

JEE Main 2023 Solution View → 103

Given below are two statements : Statement I : under Clemmensen reduction conditions will give Statement II : under Wolff-Kishner reduction condition will give In the light of the

JEE Main 2023 Solution View → 104

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Benzene is more stable than hypothetical cyclohexatriene. Reason

JEE Main 2023 Solution View → 105

The number of isomeric tetraenes (NOT containing sp-hybridized carbon atoms) that can be formed from the following reaction sequence is _____ .

JEE Advanced 2022 Solution View → 106

The number of - CH 2 - (methylene) groups in the product formed from the following reaction sequence is _____ .

JEE Advanced 2022 Solution View → 107

Which among the following pairs of the structures will give different products on ozonolysis? (Consider the double bonds in the structures are rigid and not delocalized.)

JEE Main 2022 Solution View → 108

In bromination of Propyne, with Bromine 1 , 1 , 2 , 2 -tetrabromopropane is obtained in 27 % yield. The amount of 1 , 1 , 2 , 2 tetrabromopropane obtained from 1   g of Bromin

JEE Main 2022 Solution View → 109

Arrange the following in increasing order of reactivity towards nitration A. p -xylene B. bromobenzene C. mesitylene D. nitrobenzene E. benzene Choose the correct answer from the o

JEE Main 2022 Solution View → 110

Choose the correct option for the following reactions.

JEE Main 2022 Solution View → 111

Identify the correct statement for the below given transformation.

JEE Main 2022 Solution View → 112

In the following reaction ​​​​​​​ The % yield for reaction I is 60 % and that of reaction II is 50 % . The overall yield of the complete reaction is %

JEE Main 2022 Solution View → 113

Cl ˙ + CH 4 → A + B A and B in the above atmospheric reaction step are

JEE Main 2022 Solution View → 114

The major product formed in the given reaction is:

JEE Main 2022 Solution View → 115

In the presence of sunlight, benzene reacts with Cl 2 to give product, X . The number of hydrogens in X is

JEE Main 2022 Solution View → 116

Major product of the following reaction is

JEE Main 2022 Solution View → 117

The total number of monobromo derivatives formed by the alkanes with molecular formula C 5 H 12 is (excluding stereo isomers)

JEE Main 2022 Solution View → 118

A compound ' A ' on reaction with ' X ' and ' Y produces the same major product but different by product ' a ' and ' b '. Oxidation of ' a &

JEE Main 2022 Solution View → 119

Two isomers ' A ' and ' B ' with molecular formula C 4 H 8 give different products on oxidation with KMnO 4 in acidic medium. Isomer ' A ' on reaction with

JEE Main 2022 Solution View → 120

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

JEE Main 2022 Solution View →
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