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Hydrocarbons

Maharashtra Board · Class 11 · Chemistry

Complete topic list for Hydrocarbons in Maharashtra Board Class 11 Chemistry. Key concepts, sub-topics, and what to focus on for board exams.

45 questions24 flashcards5 concepts

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4 Topics · Maharashtra Board Class 11 Chemistry

Topics in Hydrocarbons

1

Classification and General Properties

  • Hydrocarbons are classified as: Aliphatic (saturated alkanes CₙH₂ₙ₊₂, unsaturated alkenes CₙH₂ₙ, alkynes CₙH₂ₙ₋₂) and Aromatic (benzene and derivatives)
  • Alkanes are called paraffins due to their low chemical reactivity (parum affinis = little affinity)
  • Physical properties trend: B.P. and M.P. increase with molecular mass, branching decreases B.P.
2

Alkanes - Structure, Preparation and Reactions

  • Alkanes show chain isomerism (different carbon skeletons) starting from C₄H₁₀
  • Industrial source: Petroleum fractional distillation and natural gas
  • Laboratory preparation: Catalytic hydrogenation, Wurtz reaction, Grignard reaction, reduction of alkyl halides
3

Alkenes - Structure, Isomerism and Preparation

  • Alkenes show structural isomerism (chain and position) and geometrical isomerism (cis-trans)
  • Geometrical isomerism requires different groups on each C of C=C bond
  • Industrial source: Petroleum cracking, preparation from alcohols, alkyl halides, and vicinal dihalides
4

Alkenes - Chemical Reactions and Applications

  • Addition reactions: Hydrogenation, halogenation, hydrohalogenation (Markovnikov's rule), hydration
  • Markovnikov's rule: H goes to C with more H atoms, X goes to C with fewer H atoms
  • Anti-Markovnikov addition: HBr with peroxides gives opposite regioselectivity

Key Concepts

Hydrocarbons are classified based on structureCompounds with same molecular formula butDifferent spatial arrangements of atoms dueOccurs due to restricted rotation aboutAlkane halogenation proceeds through initiation (Cl₂

Frequently Asked Questions

What are the important topics in Hydrocarbons for Maharashtra Board Class 11 Chemistry?
Hydrocarbons covers several key topics that are frequently asked in Maharashtra Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Hydrocarbons — Maharashtra Board Class 11 Chemistry?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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