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Chemistry - Hydrocarbons

Practise 41 KCET previous year questions on Hydrocarbons, compiled from papers spanning 2007 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty KCET tests.

Hydrocarbons has been asked in 18 of the 20 years of KCET papers analysed (2007–2026), with 41 questions in all. 41% of them were easy, 41% moderate and 17% tough. Most of its questions came from 2021, with 5 questions that year. In the last three years (2024–2026) it had 2 questions across 3 papers, about 0.7 per paper.

The chapter's 10 topics are not weighted equally: Reactions of aromatic compounds (13 questions, 32%), Properties and Preparation of Alkanes (8 questions, 20%), and Reactions of alkenes (5 questions, 12%) have been asked the most. Over the last five years the most frequent topics have been Reactions of alkenes (1), Reactions of alkynes (1), and Reactions of aromatic compounds (1). Reactions of aromatic compounds has produced the most tough questions (3).

  1. 1Oxidation of Toluene with chromyl chloride followed by hydrolysis gives Benzaldehyde. This reaction is known as _____2025Reactions of aromatic compounds
  2. 2But-1-yne on reaction with dil. in presence of ions at 333 K gives2024Reactions of alkynes
  3. 3Identify, and in the following reaction2022Reactions of alkenes
  4. 4In set of reactions, identify2021Reactions of Benzene
  5. 5The method by which aniline cannot be prepared is2021Reactions of aromatic compounds
  6. 6Peroxide effect is observed with the addition of HBr but not with the addition of HI to unsymmetrical alkene because2021Reactions of alkenes
  7. 7The compound (major product) is2021Reactions of aromatic compounds
  8. 8The major product of the following reaction is Product2021Reactions of alkenes
  9. 9The final product for the reaction is2020Reactions of aromatic compounds
  10. 10Identify ' in the following reaction.2020Reactions of aromatic compounds
  11. 11If Aniline is treated with \( 1: 1 \) mixture of conc. \( {HNO}_{3} \) and con. \( {H} 2 {SO}_{4}, {p} \)-nitroaniline and \( {m} \) - nitro2019Reactions of aromatic compounds
  12. 12\[ {P} { {H}_{2} / {Pd}- {BaSO}_{4}}{ } {Q} { { (i) conc. } {NaOH}}{ } {R}+ {S} \] \( R \) and \( S \) form benzyl benzoate when treated wit2019Reactions of aromatic compounds
  13. 13\( 2 \)-butyne is reduced to trans-but-2-ene using2019Reactions of alkynes
  14. 14The products \( X \) and \( Z \) in the following reaction sequence are2018Reactions of aromatic compounds
  15. 15In the following reaction the compound \( Z \) is2018Reactions of aromatic compounds
  16. 16The reagent ' \( X \) ' used for the following reaction is2018Reactions of alkynes
  17. 17Which of the following compounds undergoes haloform reaction?2018Properties and Preparation of Alkynes
  18. 18n-Propyl chloride reacts with sodium metal in dry ether to give2018Properties and Preparation of Alkanes
  19. 19The monomer used in Novolac, a polymer usedin paints2017Properties and Preparation of Alkanes
  20. 20In the reaction :2016Reactions of alkenes
  21. 21Electrophile that participates in nitration of benzene is2016Reactions of aromatic compounds
  22. 22The hydrolysis of optically active \( 2 \)-bromobutane with aqueous \( {NaOH} \) result in the formation of2015Properties and Preparation of Alkanes
  23. 23Acetic acid is treated with \( {Ca}( {OH})_{2} \) and the product so obtained is subjected to dry distillation. The final product is2015Properties and Preparation of Alkanes
  24. 24Terylene is NOT a2014Reactions of aromatic compounds
  25. 25The correct statement is2014Reactions of aromatic compounds
  26. 26The statement that is NOT correct is2014Reactions of Benzene
  27. 27Methane can be converted into ethane by the reactions2013Reactions of alkanes
  28. 28Conversion of benzene to acetophenone can be brought by2013Reactions of aromatic compounds
  29. 29An alkyl bromide reacts with sodium in ether to form 4,5 -diethyl octane, the compound is2013Reactions of alkanes
  30. 30The compound formed when calcium acetate and calcium formate is distilled2013Properties and Preparation of Alkanes
  31. 31An organic compound ' ' burns with a sooty flame. It is negative towards Tollen's reagent test and positive for Borsche's reagent test. The 2012Reactions of alkynes
  32. 32The number of moles of hydrogen that can be added to 1 mole of an oil is the highest in2012Properties and Preparation of Alkanes
  33. 33Which one of these is not true for benzene?2011Preparation and Reactions of cycloalkanes and cycloalkenes
  34. 34The correct sequence of reactions to convert p-nitrophenol into quinol involves2010Preparation and Reactions of cycloalkanes and cycloalkenes
  35. 35of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus, obtained is completely converted into a 2010Reactions of alkynes
  36. 36The electrophile involved in the sulphonation of benzene is2009Reactions of alkanes
  37. 37The one which has least iodine value is2009Properties and Preparation of Alkanes
  38. 38In order to increase the volume of a gas by , the pressure of the gas should be2008Properties and Preparation of Alkenes
  39. 39Dalda is prepared from oils by2008Reactions of alkenes
  40. 40The reagent used in Clemmensen's reduction is2007Properties and Preparation of Alkanes
  41. 41Decomposition of benzene diazonium chloride by using to form chlorobenzene is2007Preparation and Properties of Benzene

Frequently Asked Questions

1.How many questions are available for Hydrocarbons?

This chapter includes 41 questions compiled from KCET papers spanning 2007 to 2025.

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

These are KCET 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 KCET Chemistry?

Hydrocarbons has appeared in 18 of the 20 years of KCET papers covered here, with 41 questions across 18 papers - about 2 per paper it appears in.

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

Of the 41 questions analysed for this chapter, 41% are easy, 41% moderate and 17% tough. 2021 had the most, with 5 questions.

5.Which topics in Hydrocarbons should I focus on?

These topics have carried the most weightage in Hydrocarbons:

  • Reactions of aromatic compounds - 13 questions (32%)
  • Properties and Preparation of Alkanes - 8 questions (20%)
  • Reactions of alkenes - 5 questions (12%)
  • Reactions of aromatic compounds has produced the most tough questions (3).
6.Is Hydrocarbons's weightage in KCET going up or down?

Across all 18 papers analysed, Hydrocarbons has averaged about 2.3 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.