Hydrocarbons — Class 11 Chemistry (Samacheer Kalvi)
TN State Board (Samacheer Kalvi) Class 11 Chemistry, Chapter 13. Alkanes, alkenes, alkynes and aromatic compounds.
1. About this chapter
This chapter covers Hydrocarbons as part of the Class 11 Samacheer Kalvi Chemistry curriculum. It deals with alkanes, alkenes, alkynes and aromatic compounds and builds conceptual understanding essential for the TN HSC Public Exam.
By the end of this chapter, students will be able to:
- Describe reactions of alkanes, alkenes and alkynes
- Explain aromaticity and substitution in benzene
2. Key concepts
- Concept 1: Describe reactions of alkanes, alkenes and alkynes.
- Concept 2: Explain aromaticity and substitution in benzene.
3. Important terms and formulas
| Term / Formula | Description |
|---|---|
| Describe reactions of alkanes,… | Describe reactions of alkanes, alkenes and alkynes |
| Explain aromaticity and substitution… | Explain aromaticity and substitution in benzene |
4. Worked examples
Example 1. Applying a key concept from this chapter.
Solution: Identify the relevant principle → apply the formula or rule → state the answer with correct units.
Example 2. A typical exam-style question on hydrocarbons.
Solution: Break the problem into steps, use the appropriate formula and verify the answer.
5. Common mistakes
- Mistake: Skipping units or forgetting to state them. Fix: Always write units alongside every quantity and answer.
- Mistake: Confusing similar terms or concepts in this chapter. Fix: Make a comparison table of the terms during revision.
6. Practice (exam-style)
- Define the main term or principle covered in Chapter 13.
- Give two real-life examples related to hydrocarbons.
- Solve a short numerical or descriptive question from this chapter.
- State one important formula and explain each symbol.
7. Answer key (hints)
- Refer to section 2 (Key concepts) above for the definition.
- Examples should be drawn from daily experience and local context.
- Apply the formula from section 3, show all steps clearly.
- Formula with units — refer to the textbook glossary for symbol meanings.
8. Quick revision
- Class 11 Chemistry — Chapter 13: Hydrocarbons.
- Core idea: Alkanes, alkenes, alkynes and aromatic compounds.
- Key outcomes: Describe reactions of alkanes, alkenes and alkynes; Explain aromaticity and substitution in benzene.
- Always revise diagrams / tables from the Samacheer Kalvi textbook before the exam.
