Hydrocarbons MCQs [Organic Chemistry]

By: Prof. Dr. Fazal Rehman | Last updated: May 23, 2025

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1. : Resonance energy of benzene is



2. : Alkaline KMnO4 oxidizes acetylene to which of the following?



3. : The hemolytic fission of hydrocarbon results in the formation of



4. : Which reactions can be used to prepare alkane from an alkyl halide?



5. : Which cannot be prepared by Wurtz reaction?



6. : Which alkanes cannot be synthesized by Kolbe reaction of sodium salt of carboxylic acid?



7. : Cetane is a _________.



8. : Coal is mainly a source of



9. : Which is not present in crude naphtha?



10. : What is an Octane number of iso-octane?



11. : Petroleum is mainly a source of



12. : Gasoline contains hydrocarbons in the range



13. : How Successive alkanes differ?



14. : Which reactions can be employed to get unsymmetrical alkanes in good yield?



15. : Alcoholic solution of caustic potash is a specific reagent for which technique?



16. : According to ____, When an alkyl halide is treated dry ether, a symmetry alkane with Na in dry ether, a symmetry alkane is obtained.



17. : The reduction of an alkyne to alkene using Lindlar’s catalyst results into



18. : The addition of HCl to 2-pentene gives which of the following?



19. : When propyne is treated with aqueous H₂SO4 in the presence of HgSO4, Which is the functional isomer of the major product obtained?



20. : What is the relative order of stability of carbocations RC=CH₂, RCH2 and RCH=CH RCH CH?

22. : __________ proved that all the six hydrogen atoms in benzene are equivalent?



23. : Each of the following compound aromatic excluding which of the following?



24. : Sodium propionate on decarboxylation with soda-lime gives ______.



25. : Ethyne can be prepared from a single step from



26. : Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives _____________ .



27. : Among the following statements on the nitration of aromatic compounds, the false one is



28. : Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4. In the nitrating mixture, as a/an



29. : The electrophile in the sulphonation of benzene is



30. : Benzene on ozonolysis yields



31. : Chlorination of an alkane involves the attack of



32. : Complete oxidation of ethane yields



33. : Which compound is liquid at room temperature?



34. : What is the state of hybridization of carbon in methane?



35. : ___________ is the formation of alkane by the action of Zn dust.



36. : Which catalyst is used in the reduction of carbonyl group to -CH2?



37. : Which of the following is the process of heating coal in the absence of air?



38. : The percentage of carbon is higher in ______.



39. : During distillation of coal tar, anthracene is mainly present in



40. : (CH3)3CMgCl on reaction with D₂O produces



41. : 1-Butyne on oxymercuration-demercuration would give



42. : Preparation of vegetable ghee involves



43. : Ethyl bromide reacts with Zn and HCl to form



44. : The most reactive hydrocarbon is



45. : Toluene is o/p-orienting with respect to an electrophilic substitution reaction due to



 

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  5. Halogenated Organic Compounds MCQs
  6. Carboxylic Acids MCQs
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