Hydrocarbons: Alkanes, Alkenes, Alkynes - Applications

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This section highlights the practical and industrial significance of hydrocarbons, demonstrating how alkanes, alkenes, and alkynes are used as energy sources, raw materials, and chemical intermediates. It is designed for Class 11–12 students, competitive exam aspirants, and undergraduate learners to connect textbook chemistry with real-world utility.

In this section, you will explore:

  • Use of alkanes as fuels, lubricants, refrigerants, and solvents

  • Role of alkenes in polymer manufacturing (plastics, synthetic fibers)

  • Industrial importance of alkynes in chemical synthesis and welding

  • Petrochemical cracking and reforming processes

  • Hydrocarbons as starting materials for functional group transformations

  • Environmental impact, fuel efficiency, and sustainable alternatives

  • Application-based questions commonly asked in exams

The content is structured to strengthen application-oriented thinking, improve concept relevance, and prepare students for real-world and industry-linked exam questions.

Understanding the applications of hydrocarbons helps students appreciate their central role in energy production, materials science, and chemical industries, while also recognizing environmental and sustainability considerations.

Q. What is the common use of alkenes in the industry?
  • A. Fuel
  • B. Plastics production
  • C. Solvents
  • D. Food additives
Q. What is the functional group present in alkenes?
  • A. Alcohol
  • B. Aldehyde
  • C. Alkene
  • D. Alkyne
Q. What is the IUPAC name for the compound with the structure CH≡C-CH2-CH3?
  • A. 1-butyne
  • B. 2-butyne
  • C. 1-pentyne
  • D. 3-butyne
Q. What is the main application of alkenes in the industry?
  • A. Fuel
  • B. Plastics
  • C. Solvents
  • D. Detergents
Q. What is the main functional group in alkenes?
  • A. Alcohol
  • B. Aldehyde
  • C. Alkene
  • D. Alkyne
Q. What type of reaction occurs when an alkene reacts with HBr?
  • A. Addition reaction
  • B. Elimination reaction
  • C. Substitution reaction
  • D. Redox reaction
Q. Which of the following is the correct stereochemical descriptor for 2-butene with the double bond in the trans configuration?
  • A. cis-2-butene
  • B. trans-2-butene
  • C. 1-butene
  • D. butyne
Q. Which reaction mechanism is primarily involved in the addition of HBr to an alkene?
  • A. Electrophilic addition
  • B. Nucleophilic substitution
  • C. Radical substitution
  • D. Elimination
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