Hydrocarbons: Alkanes, Alkenes, Alkynes - Real World Applications

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This section explores the practical importance of Alkanes, Alkenes, and Alkynes in everyday life and industrial chemistry. Hydrocarbons are not just theoretical molecules studied in Organic Chemistry—they are the foundation of fuels, plastics, synthetic materials, pharmaceuticals, and numerous industrial processes.

Designed for Class 11–12 students, NEET/JEE aspirants, and undergraduate learners, this category connects core concepts such as bonding, hybridization, reactivity, and reaction mechanisms to real-world applications.

In this section, you will study:

• Alkanes as major energy sources (CNG, LPG, petrol, diesel, aviation fuel)
• Fractional distillation of crude oil and the petrochemical industry
• Industrial use of alkenes in manufacturing polymers like polyethylene and polypropylene
• Production of alcohols, glycols, and halogen derivatives from alkenes
• Use of alkynes such as acetylene in welding and metal cutting
• Role of hydrocarbons in plastics, synthetic rubber, detergents, and fibers
• Environmental concerns related to hydrocarbon combustion and air pollution
• Sustainable and cleaner fuel alternatives

By linking classroom theory with industrial and environmental contexts, this section strengthens conceptual clarity while building analytical understanding. It helps students appreciate how Hydrocarbons form the backbone of modern industry and supports strong preparation for school examinations, competitive exams, and higher studies in Chemistry.

Q. What is the correct IUPAC name for CH3-CH2-CH=CH2?
  • A. Butene
  • B. 1-Butene
  • C. 2-Butene
  • D. Propene
Q. What is the main functional group present in alkenes?
  • A. Alcohol
  • B. Aldehyde
  • C. Alkene
  • D. Alkyne
Q. What is the main use of alkenes in the industry?
  • A. Fuel
  • B. Plastics production
  • C. Solvents
  • D. Detergents
Q. What is the product of the complete combustion of ethyne (C2H2)?
  • A. C2H4 + H2O
  • B. CO2 + H2O
  • C. C2H6 + O2
  • D. C2H2 + O2
Q. What type of isomerism is exhibited by 1-butene and 2-butene?
  • A. Structural isomerism
  • B. Geometric isomerism
  • C. Optical isomerism
  • D. Conformational isomerism
Q. What type of isomerism is exhibited by butene (C4H8)?
  • A. Structural isomerism
  • B. Geometric isomerism
  • C. Optical isomerism
  • D. Conformational isomerism
Q. Which of the following is a real-world application of alkenes?
  • A. Fuel production
  • B. Plastic manufacturing
  • C. Food preservation
  • D. Medicinal chemistry
Q. Which of the following is the correct IUPAC name for 2-methylpropene?
  • A. 2-methylprop-1-ene
  • B. 3-methylprop-1-ene
  • C. 2-methylbut-1-ene
  • D. 1-methylbut-2-ene
Q. Which reaction mechanism is primarily involved in the addition of HBr to propene?
  • A. Electrophilic addition
  • B. Nucleophilic substitution
  • C. Radical substitution
  • D. Elimination
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