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Chemistry - Hydrocarbons

Practise 55 AIIMS previous year questions on Hydrocarbons, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Hydrocarbons has been asked in 19 of the 19 years of AIIMS papers analysed (2001–2019), with 55 questions in all. 40% of them were easy, 44% moderate and 16% tough. Most of its questions came from 2008, with 6 questions that year. In the last three years (2017–2019) it had 9 questions across 5 papers, about 1.8 per paper.

The chapter's 9 topics are not weighted equally: Reactions of aromatic compounds (18 questions, 33%), Reactions of alkenes (16 questions, 29%), and Properties and Preparation of Alkenes (6 questions, 11%) have been asked the most. Reactions of aromatic compounds has produced the most tough questions (2).

  1. 1is26 May, 2019Reactions of alkenes
  2. 2Assertion : Propene reacts with in presence of peroxide to give 1-iodopropane. Reason : free radical is more stable than free radical.26 May, 2019Reactions of alkenes
  3. 3For the following reaction,25 May, 2019Reactions of aromatic compounds
  4. 4Assertion : For the reaction, the product is isopropyl benzene. Reason : This is due to rearrangement of primary carbocation into secondary 27 May, 2018Reactions of aromatic compounds
  5. 5What is decreasing order of boiling points for the following compounds?26 May, 2018Properties and Preparation of Alkanes
  6. 6In the given reaction,26 May, 2018Reactions of aromatic compounds
  7. 7Which of the following reactions gives wrong product?26 May, 2018Preparation and Properties of Benzene
  8. 8What will be compound in the following reaction?2017Reactions of alkenes
  9. 9Assertion : Benzene reacts with iodine monochloride in presence of anhyd. to form iodobenzene. Reason: Iodine monochloride reacts with anhyd2017Reactions of aromatic compounds
  10. 10Which of the following alkenes will give same product by any method out of hydration, hydroboration-oxidation and oxymercurationdemercuratio2016Reactions of alkenes
  11. 11Which one of the following does not give white precipitate with acidified silver nitrate solution?2016Reactions of alkynes
  12. 12Isopropylbenzene on air oxidation in the presence of dilute acid gives2015Reactions of Benzene
  13. 13Assertion : Saturated hydrocarbons are chemically less reactive. Reason : All isomeric paraffins have same parent name.2015Properties and Preparation of Alkanes
  14. 14What is ' ' in the following reaction?2014Reactions of alkenes
  15. 15During the dehydration of alcohols to alkenes by heating with conc. , the initiating step is2014Properties and Preparation of Alkenes
  16. 16In Clemmensen reduction, carbonyl compound is treated with2014Properties and Preparation of Alkanes
  17. 17Assertion : Saturated hydrocarbons are chemically less reactive. Reason: All isomeric paraffins have same parent name.2014Properties and Preparation of Alkanes
  18. 18Which of the following reaction will not produceethylene glycol?2013Reactions of alkenes
  19. 19When trans-2-butene is reacted with then product formed is2013Reactions of alkenes
  20. 20Which is the major product formed when undergoes nitration?2012Reactions of aromatic compounds
  21. 21But-1-ene ? The product in the above reaction is2012Reactions of alkenes
  22. 22Nitrobenzene will be2012Reactions of alkenes
  23. 23Assertion : Sodiumacetate on Kolbe'selectrolysis gives methane. Reason : Methyl free radical is formed at cathode.2012Properties and Preparation of Alkanes
  24. 24Assertion : is more stable than . Reason : has more s-character than2012Properties and Preparation of Alkynes
  25. 25Assertion : Toluene in presence of UV rays forms benzaldehyde. Reason : Dichlorotoluene is formed as an intermediate.2011Reactions of aromatic compounds
  26. 26The strained tetracyclic alkane is isomerize thermally to the cyclic alkene. The reaction involves2010Reactions of alkanes
  27. 27Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound . Compound on further treatment with aqueous KOH yiel2010Reactions of alkenes
  28. 28Assertion : Benzene on heating with conc. gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene.2010Reactions of aromatic compounds
  29. 29Preview not available - open to view this question.2009Reactions of alkenes
  30. 30What is ?2009Reactions of alkanes
  31. 31Assertion: Cis-2-butene gives meso-2, 3-butanediol with dilute alkaline solution. Reason : Dilute alkaline solution gives trans addition wit2009Reactions of alkenes
  32. 32Assertion : The presence of enhances the solubility of alkenes in water. Reason : Alkenes are weakly polar in nature.2009Properties and Preparation of Alkenes
  33. 33Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heat2008Preparation and Properties of Benzene
  34. 34\( {CH}_3 {CH}= {CHCH}_3+ {CHCl}_3+t- {BuOK} A\). \(A\) is2008Reactions of alkenes
  35. 35The function of \( {ACl}_3\) in Friedel-Craft's reaction is to2008Reactions of aromatic compounds
  36. 36\( {C}_6 {H}_6 { {H}_2 {SO}_4}{ { {HNO}_3}{ }} X { {FeCl}_3}{ { {Cl}_2}{ }} Y\). In the above sequence \(Y\) can be2008Reactions of aromatic compounds
  37. 37Assertion : Phenol is more reactive than benzene towards electrophilic substitution reaction. Reason : In the case of phenol, the intermedia2008Reactions of aromatic compounds
  38. 38The reaction of an organic compound with ammonia followed by nitration of the product gives a powerful explosive called RDX. The organic com2008Reactions of aromatic compounds
  39. 39The product obtained is/are2007Reactions of aromatic compounds
  40. 40Which of the following species participate in sulphonation of benzene ring ?2007Reactions of aromatic compounds
  41. 41Assertion : Benzene diazonium salt on boiling with water forms phenol. Reason : \( {C}- {N}\) bond is polar.2007Preparation and Properties of Benzene
  42. 42Assertion : Acetylene on reacting with sodamide gives sodium acetylide and ammonia. Reason : \(s p\) hybridised carbon atoms of acetylene ar2007Reactions of alkynes
  43. 43Which of the following sequence of reactions (reagents) can be used for the conversion of into ?2006Properties and Preparation of Alkenes
  44. 44Assertion : Addition of on 2-butene gives two isomeric products. Reason : Addition of on 2-butene follows Markovnikov's rule.2006Reactions of alkenes
  45. 45Which of the following gives propyne on hydrolysis?2005Properties and Preparation of Alkynes
  46. 46Which of the following molecules is most suitable to disperse benzene in water?2005Reactions of aromatic compounds
  47. 47The major product obtained on treatment of with is2005Properties and Preparation of Alkenes
  48. 48Assertion : Rates of nitration of benzene and hexadeuterobenzene are different. Reason : bond is stronger than bond.2005Reactions of aromatic compounds
  49. 49Among the following the most reactive towards alcoholic is2004Properties and Preparation of Alkenes
  50. 50Assertion : 2-bromobutane on reaction with sodium ethoxide in ethanol gives 1-butene as a major product. Reason : 1-butene is more stable th2004Properties and Preparation of Alkenes

Frequently Asked Questions

1.How many questions are available for Hydrocarbons?

This chapter includes 55 questions compiled from AIIMS papers spanning 2001 to 2019.

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

These are AIIMS questions specifically for the Hydrocarbons chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Hydrocarbons an important chapter for AIIMS Chemistry?

Hydrocarbons has appeared in 19 of the 19 years of AIIMS papers covered here, with 55 questions across 21 papers - about 3 per paper it appears in.

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

Of the 55 questions analysed for this chapter, 40% are easy, 44% moderate and 16% tough. 2008 had the most, with 6 questions.

5.Which topics in Hydrocarbons should I focus on?

These topics have carried the most weightage in Hydrocarbons:

  • Reactions of aromatic compounds - 18 questions (33%)
  • Reactions of alkenes - 16 questions (29%)
  • Properties and Preparation of Alkenes - 6 questions (11%)
  • Reactions of aromatic compounds has produced the most tough questions (2).
6.Is Hydrocarbons's weightage in AIIMS going up or down?

Across all 21 papers analysed, Hydrocarbons has averaged about 2.6 questions per paper. In the last three years (2017–2019), that average has fallen, at about 1.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.