By the end of this chapter you'll be able to…

  • 1Describe preparation and reactions of amines
  • 2Explain uses of diazonium salts
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Why this chapter matters
Organic Nitrogen Compounds is an important chapter in Class 12 Chemistry (Samacheer Kalvi). It covers amines, diazonium salts and nitro compounds — concepts that are tested in the TN HSC Public Exam and build the foundation for higher-level studies.

Before you start — revise these

A 5-minute refresher here will save you 30 minutes of confusion below.

Organic Nitrogen Compounds — Class 12 Chemistry (Samacheer Kalvi)

TN State Board (Samacheer Kalvi) Class 12 Chemistry, Chapter 13. Amines, diazonium salts and nitro compounds.


1. About this chapter

This chapter covers Organic Nitrogen Compounds as part of the Class 12 Samacheer Kalvi Chemistry curriculum. It deals with amines, diazonium salts and nitro compounds and builds conceptual understanding essential for the TN HSC Public Exam.

By the end of this chapter, students will be able to:

  • Describe preparation and reactions of amines
  • Explain uses of diazonium salts

2. Key concepts

  • Concept 1: Describe preparation and reactions of amines.
  • Concept 2: Explain uses of diazonium salts.

3. Important terms and formulas

Term / FormulaDescription
Describe preparation and reactions…Describe preparation and reactions of amines
Explain uses of diazonium…Explain uses of diazonium salts

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 organic nitrogen compounds.

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)

  1. Define the main term or principle covered in Chapter 13.
  2. Give two real-life examples related to organic nitrogen compounds.
  3. Solve a short numerical or descriptive question from this chapter.
  4. State one important formula and explain each symbol.

7. Answer key (hints)

  1. Refer to section 2 (Key concepts) above for the definition.
  2. Examples should be drawn from daily experience and local context.
  3. Apply the formula from section 3, show all steps clearly.
  4. Formula with units — refer to the textbook glossary for symbol meanings.

8. Quick revision

  • Class 12 Chemistry — Chapter 13: Organic Nitrogen Compounds.
  • Core idea: Amines, diazonium salts and nitro compounds.
  • Key outcomes: Describe preparation and reactions of amines; Explain uses of diazonium salts.
  • Always revise diagrams / tables from the Samacheer Kalvi textbook before the exam.

Key formulas & results

Everything you need to memorise, in one card. Screenshot this for revision.

Key concept from Organic Nitrogen Compounds
Refer to Samacheer Kalvi textbook
Chapter 13 — Amines, diazonium salts and nitro compounds.
⚠️

Common mistakes & fixes

These are the exact errors that cost students marks in board exams. Read them once, save yourself the trouble.

WATCH OUT
Skipping units in numerical answers
Always state units alongside every numerical answer for full marks.
WATCH OUT
Confusing similar concepts within the chapter
Create a side-by-side comparison table during revision.

NCERT exercises

Every NCERT exercise from this chapter — what it covers and how many questions to expect.

Multiple choice questions
Multiple choice questions
One-mark MCQs testing key definitions and concepts from Organic Nitrogen Compounds.
5
Questions
Short answer questions
Short answer questions
Two-mark and three-mark questions on amines, diazonium salts and nitro compounds.
5
Questions
Long answer / Numerical questions
Long answer / Numerical questions
Five-mark questions requiring detailed explanation or problem-solving.
3
Questions

Practice problems

Work through this chapter's problems as a readiness check — reveal each solution, mark yourself honestly, and get your gap report at the end.

Readiness check

Are you exam-ready for Organic Nitrogen Compounds?

3 problems from this chapter. Try each one, reveal the worked solution, mark yourself honestly — get your gap report at the end.

3 questions~2 min worth ~5 marks in Tamil Nadu (TNBSE) exams

5-minute revision

The whole chapter, distilled. Read this the night before the exam.

  • Class 12 Chemistry — Chapter 13: Organic Nitrogen Compounds.
  • Core topic: Amines, diazonium salts and nitro compounds.
  • Describe preparation and reactions of amines.
  • Explain uses of diazonium salts.

Tamil Nadu (TNBSE) marks blueprint

Where the marks come from in this chapter — so you can plan your prep.

Typical chapter weightage: Carries marks in the TN HSC Public Exam through MCQs, short-answer and long-answer (5-mark) questions

Question typeMarks eachTypical countWhat it tests
MCQ11-2Definitions and key facts
Short Answer2-31-2Explanation and examples
Long Answer51Detailed explanation, diagram and application
Prep strategy
  • Read and understand all definitions in Chapter 13
  • Memorise key formulas and their units
  • Practice past-paper questions from this chapter
  • Draw and label all diagrams from the Samacheer Kalvi textbook

Where this shows up in the real world

This chapter isn't just an exam topic — it lives in the world around you.

Everyday application of Organic Nitrogen Compounds

Concepts from organic nitrogen compounds are applied widely in daily life and professional fields.

Exam strategy

Battle-tested tips from teachers and toppers for this chapter.

1
Read the question carefully before answering
2
Write definitions precisely and use technical vocabulary
3
Draw labelled diagrams wherever applicable
4
Show all steps in numerical problems for full marks

Going beyond the textbook

For olympiad aspirants and curious learners — topics that build on this chapter.

STRETCH
Explore advanced problems on organic nitrogen compounds from Olympiad resource books.
STRETCH
Look for cross-connections between this chapter and other subjects.

Where else this chapter is tested

CBSE board isn't the only one — other exams test this chapter too.

TN HSC Public ExamHigh
School Unit TestsHigh
NTSE / Olympiad (Classes 9–12)Medium

Questions students ask

The real ones — pulled from the Q&A community and tutor sessions.

This chapter focuses on amines, diazonium salts and nitro compounds as part of the Class 12 Samacheer Kalvi Chemistry curriculum.

Carries marks in the TN HSC Public Exam through MCQs, short-answer and long-answer (5-mark) questions
Verified by the tuition.in editorial team
Last reviewed on 3 June 2026. Written and reviewed by subject-matter experts — read about our process.
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