Hydrocarbons: Alkanes, Alkenes, Alkynes - Problem Set

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This problem set focuses on strengthening core concepts related to Alkanes, Alkenes, and Alkynes, the fundamental classes of hydrocarbons in Organic Chemistry. Designed for Class 11–12 students, NEET/JEE aspirants, and undergraduate learners, it emphasizes conceptual clarity, reaction mechanisms, and exam-oriented application.

In this section, students will practice:

  • General formulas and classification of hydrocarbons

  • IUPAC nomenclature and structural representation

  • Structural and geometrical isomerism

  • Physical properties and trends (boiling point, stability, reactivity)

  • Important reactions such as combustion, substitution, addition, and hydrogenation

  • Markovnikov’s and anti-Markovnikov’s rule

  • Hybridization, bond formation (σ and π bonds), and molecular structure

  • Concept-based MCQs and assertion–reason questions

The questions are structured progressively—from basic identification and naming to higher-order analytical and mechanism-based problems—to build strong conceptual foundations and problem-solving skills.

This problem set helps learners prepare effectively for school examinations, NEET, JEE, and undergraduate chemistry assessments, ensuring clarity in one of the most important chapters of Organic Chemistry.

Q. What is the major product of the reaction between 1-butyne and HBr?
  • A. 1-bromobutane
  • B. 2-bromobutane
  • C. butane
  • D. bromobenzene
Q. What is the major product of the reaction of 2-pentene with HBr?
  • A. 1-bromopentane
  • B. 2-bromopentane
  • C. 3-bromopentane
  • D. bromopentane
Q. What is the molecular formula for 2,3-dimethylpentane?
  • A. C7H16
  • B. C8H18
  • C. C6H14
  • D. C5H12
Q. What is the product of the hydrogenation of 1-hexene?
  • A. Hexane
  • B. Cyclohexane
  • C. 1-hexanol
  • D. 2-hexanol
Q. What is the product of the reaction of ethylene with bromine?
  • A. Bromomethane
  • B. 1,2-dibromoethane
  • C. Bromoethane
  • D. Ethane
Q. What type of isomerism is exhibited by 1-butene and cis-2-butene?
  • A. Structural isomerism
  • B. Geometric isomerism
  • C. Optical isomerism
  • D. Conformational isomerism
Q. Which of the following is the correct IUPAC name for CH3-CH2-C≡C-CH3?
  • A. 1-pentyne
  • B. 2-pentyne
  • C. 3-pentyne
  • D. butyne
Q. Which of the following is the correct IUPAC name for CH3-C≡C-CH2-CH3?
  • A. 1-pentyne
  • B. 2-pentyne
  • C. 3-pentyne
  • D. 1-butyne
Q. Which of the following is the correct product of the reaction between 1-butyne and H2 in the presence of a catalyst?
  • A. 1-butene
  • B. 2-butene
  • C. butane
  • D. butyne
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