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Chemistry - Hydrocarbons

Practise 72 COMEDK previous year questions on Hydrocarbons, compiled from papers spanning 2012 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty COMEDK tests.

Hydrocarbons has been asked in 14 of the 15 years of COMEDK papers analysed (2012–2026), with 72 questions in all. 26% of them were easy, 63% moderate and 11% tough. Most of its questions came from 2025, with 18 questions that year. In the last three years (2024–2026) it had 41 questions across 10 papers, about 4.1 per paper.

The chapter's 10 topics are not weighted equally: Reactions of alkenes (23 questions, 32%), Reactions of aromatic compounds (16 questions, 22%), and Reactions of alkynes (8 questions, 11%) have been asked the most. Reactions of alkenes has also led over the last five years, with 19 questions. Reactions of aromatic compounds has produced the most tough questions (4).

  1. 1Select the reagents needed to convert Benzene to 4–Bromophenylpropene in the correct sequential order. (A). (B). -CHCl /anhyd. (C). Alc. KOH09 May, 2026 (S1)Reactions of aromatic compounds
  2. 2The decreasing order of reactivity towards electrophilic substitutions is:09 May, 2026 (S1)Reactions of aromatic compounds
  3. 3A compound with molecular formula that gives acetone on ozonolysis is:09 May, 2026 (S1)Reactions of alkenes
  4. 4When 2-butyne is treated with dilute , the product formed is:09 May, 2026 (S1)Reactions of alkynes
  5. 5What is the major product [P ] formed when n- Hexane undergoes the given series of reactions: \( {n} {-Hexane } { {V}_2 {O}_5}{20 {~atm}, 7709 May, 2026 (S2)Reactions of alkanes
  6. 6The statements given below contains assertion and reason. Choose the correct option Assertion (A): Propene reacts with HBr in presence of or09 May, 2026 (S2)Reactions of alkenes
  7. 7The product formed in the following reaction is:09 May, 2026 (S2)Reactions of alkenes
  8. 8Arrange the given alkanes in increasing order of their boiling points. (A) 2, 2-dimethylpropane (B) 2-methylbutane (C) -pentane (D) -butane09 May, 2026 (S2)Properties and Preparation of Alkanes
  9. 9Consider the following reaction The major product ' X ' is:25 May, 2025 (Shift)Reactions of aromatic compounds
  10. 10The major product of acid catalysed hydration reaction of 3,3-dimethylbut-1-ene is:25 May, 2025 (Shift)Reactions of alkenes
  11. 11According to the decreasing order of reactivity towards electrophilic substitutions, which of the following is incorrect?25 May, 2025 (Shift)Reactions of aromatic compounds
  12. 12Consider the following reaction The reactant ' X ' is:25 May, 2025 (Shift)Reactions of alkenes
  13. 13What is the final product formed when the given reactions take place?10 May, 2025 (S1)Reactions of aromatic compounds
  14. 14An unsaturated hydrocarbon undergoes the following series of reactions. Identify .10 May, 2025 (S1)Reactions of alkynes
  15. 15Which one of the following statements is correct?10 May, 2025 (S1)Reactions of alkenes
  16. 16Convert Benzene 3-Bromophenol by choosing appropriate reagents to (v)] in the correct sequence.10 May, 2025 (S1)Reactions of aromatic compounds
  17. 17Identify the compound which gives an optically active haloalkane on reaction with / Ni on heating.10 May, 2025 (S1)Reactions of alkenes
  18. 18Identify the reagents to be used to complete the given reaction.10 May, 2025 (S2)Reactions of alkenes
  19. 19An Alkene " X " on reaction with hot acidified gave a mixture of Ethanoic acid and Propanone. Identify " X ".10 May, 2025 (S2)Reactions of alkenes
  20. 20Which of the following alkene on reductive ozonolysis gives ketones only as the product?10 May, 2025 (S3)Reactions of alkenes
  21. 21Identify the type of reaction:10 May, 2025 (S3)Reactions of alkenes
  22. 22Identify the Alkane (molecular formula ) which yields only a single monochloride on Chlorination in the presence of sunlight.10 May, 2025 (S3)Reactions of alkanes
  23. 23Identify the final product in the following reaction.10 May, 2025 (S3)Reactions of Benzene
  24. 24Which one of the following is the product formed at the end of the given reaction:10 May, 2025 (S3)Reactions of alkynes
  25. 25The correct order of reactivity of halogens with alkanes is:10 May, 2025 (S3)Reactions of alkanes
  26. 26The number of grams of bromine that will completely react with 5 g of pentene is: [Atomic mass of ]10 May, 2025 (S3)Reactions of alkenes
  27. 27The major product obtained in the following reaction is :2024 (Afternoon Shift)Reactions of alkanes
  28. 28Predict the final major product 'S' of the following reaction2024 (Afternoon Shift)Reactions of alkenes
  29. 29Arrange the following compounds in the decreasing order of reactivity towards electrophilic substitution reaction. (I) Chlorobenzene (II) Ni2024 (Afternoon Shift)Reactions of aromatic compounds
  30. 30Which of the following reactions is an example for incomplete combustion?2024 (Afternoon Shift)Reactions of alkanes
  31. 31A Hydrocarbon [A] (molecular formula ) on reaction with gave [B]. When [B] is heated with 2 moles of alcoholic , it gave compound [C]. 3 mol2024 (Evening Shift)Reactions of alkenes
  32. 32Identify the products C, D and F formed in the following sets of reactions.2024 (Evening Shift)Reactions of aromatic compounds
  33. 33Given below are 4 reactions. Two of these reactions will give product which is an equimolar mixture of the d and 1 forms. Identify these 2 r2024 (Evening Shift)Reactions of alkenes
  34. 34Arrange the following compounds in the increasing order of their reactivity when each of them is reacted with chloroethane / anhydrous AlCl 2024 (Evening Shift)Reactions of aromatic compounds
  35. 35Formation of alkanes by action of Zn on alkyl halides is called2024 (Memory Based)Properties and Preparation of Alkanes
  36. 36In the reaction given below, identify .2024 (Memory Based)Properties and Preparation of Alkenes
  37. 37Preview not available - open to view this question.2024 (Morning Shift)Reactions of alkynes
  38. 38Which one of the following compounds shows Geometrical isomerism?2024 (Morning Shift)Isomerism of Organic Compounds
  39. 39An unsaturated hydrocarbon reacts with in presence of Benzoyl peroxide to yield [B] Compound [A] when reacted with cold, dilute alkaline gav2024 (Morning Shift)Reactions of alkenes
  40. 40An aromatic hydrocarbon formula , undergoes air oxidation followed by reaction with dil. to give [B] as one of the products Compound [B] for2024 (Morning Shift)Reactions of aromatic compounds
  41. 41What is the number of mono-chloro derivatives of Ethyl cyclohexane possible?2024 (Morning Shift)Reactions of alkanes
  42. 42From among the following, identify the compound which forms two moles of a ketone on ozonolysis. [A] 2,3-Dimethylbutane. [B] 3-Methyl-1-pent2023 (Evening Shift)Reactions of alkenes
  43. 43The conversion of Propyne to Benzene can be brought out in 4 steps. Choose the reagents to be used, in the proper sequential order, to bring2023 (Evening Shift)Reactions of alkynes
  44. 44Identify the reagents and used to bring out the following reactions.2023 (Evening Shift)Preparation of Phenols
  45. 45Which of the following will show geometrical isomerism?2023 (Evening Shift)Isomerism of Organic Compounds
  46. 46Product of the following reaction is2023 (Memory Based)Reactions of alkenes
  47. 47Ammoniacal silver nitrate forms a white precipitate easily with2023 (Memory Based)Reactions of alkynes
  48. 48In Friedal-Crafts alkylation reaction of phenol with chloromethane, the product formed will be2023 (Memory Based)Reactions of aromatic compounds
  49. 49Total number of and bonds in ethene molecule is2023 (Morning Shift)Properties and Preparation of Alkenes
  50. 50Ammoniacal silver nitrate forms a white precipitate easily with2023 (Morning Shift)Reactions of alkynes

Frequently Asked Questions

1.How many questions are available for Hydrocarbons?

This chapter includes 72 questions compiled from COMEDK papers spanning 2012 to 2026.

2.Are these questions only from COMEDK, or from other exams too?

These are COMEDK questions specifically for the Hydrocarbons chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Hydrocarbons an important chapter for COMEDK Chemistry?

Hydrocarbons has appeared in 14 of the 15 years of COMEDK papers covered here, with 72 questions across 23 papers - about 3 per paper it appears in.

4.What is the difficulty level of Hydrocarbons questions in COMEDK?

Of the 72 questions analysed for this chapter, 26% are easy, 63% moderate and 11% tough. 2025 had the most, with 18 questions.

5.Which topics in Hydrocarbons should I focus on?

These topics have carried the most weightage in Hydrocarbons:

  • Reactions of alkenes - 23 questions (32%)
  • Reactions of aromatic compounds - 16 questions (22%)
  • Reactions of alkynes - 8 questions (11%)
  • Reactions of aromatic compounds has produced the most tough questions (4).
6.Is Hydrocarbons's weightage in COMEDK going up or down?

Across all 23 papers analysed, Hydrocarbons has averaged about 3.1 questions per paper. In the last three years (2024–2026), that average has risen, at about 4.1 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.