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Class 12 · Tamil Nadu State Board

Tamil Nadu Class 12 Chemistry Term 3 Unit Test — Samacheer Kalvi

Class 12 Chemistry term 3 unit test covering organic nitrogen compounds, biomolecules, chemistry in everyday life, and cumulative revision.

Updated 16 May 20262 min read

Coverage

  • Organic Nitrogen Compounds
  • Biomolecules
  • Chemistry in Everyday Life
  • Mixed revision from electrochemistry, kinetics, coordination chemistry, and surface chemistry

Section A - One Mark

1. Write the general formula of primary amines. 2. Name the test used to distinguish primary amines. 3. What linkage joins amino acids in proteins? 4. Name one reducing sugar. 5. What is an antacid? 6. State one example of an analgesic. 7. What is denaturation of proteins? 8. Name the reagent used in diazotisation of aniline. 9. Define biodegradable polymer. 10. What is the monomer unit of PVC?

Section B - Short Answer

1. Distinguish primary, secondary, and tertiary amines. 2. Explain Hinsberg test. 3. Compare glucose and sucrose as reducing and non-reducing sugars. 4. Write short notes on antibiotics and antiseptics. 5. Explain one environmental reason for preferring biodegradable materials.

Section C - Long Answer / Problems

1. Explain preparation and reactions of aniline, including diazotisation. 2. Write notes on carbohydrates, proteins, and nucleic acids with one example each. 3. Solve one mixed revision problem involving rate law, EMF, or coordination nomenclature and show every step.

Correction Checklist

  • Use correct reagent names in organic conversions.
  • Separate biomolecule definitions from examples.
  • Revise one mixed-topic numerical before the final model paper.
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