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Chemistry in Everyday Life

Tamil Nadu Board · Class 12 · Chemistry

Quick revision notes for Chemistry in Everyday Life — Tamil Nadu Board Class 12 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

44 questions40 flashcards5 concepts

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A flowchart illustrating the various ways polymers are classified: based on source (natural, synthetic), structure (linear, branched, network), synthesis (addition, condensation), and molecular forces
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Key Topics to Revise

1

15.1 DRUGS AND CHEMOTHERAPY

  • A drug is a substance used to modify physiological systems or treat pathological states for diagnosis, prevention, or cure of disease
  • Medicine is a drug that interacts with macromolecular targets (proteins) to produce therapeutic biological response
  • Chemotherapy is the specific treatment of disease using medicine
2

15.1.1 DRUG CLASSIFICATION SYSTEMS

  • Classification by chemical structure groups drugs with similar molecular frameworks (e.g., penicillins all have beta-lactam ring)
  • Penicillins include: Penicillin G, V, ampicillin, amoxicillin, methicillin - all share core structure but have different R-groups
  • Classification by pharmacological effect groups drugs by their biological actions (e.g., all antibiotics kill bacteria)
3

15.1.2 IMPORTANT DRUG CLASSES AND THERAPEUTIC ACTIONS

  • TRANQUILIZERS: Act on CNS by blocking dopamine; major (haloperidol, clozapine) for psychosis; minor (diazepam, alprazolam) for anxiety
  • ANALGESICS (non-narcotic): Reduce pain without consciousness impairment; include NSAIDs, antipyretics
  • Aspirin: NSAID that relieves pain, reduces fever, prevents platelet coagulation (heart attack prevention)
4

15.2 FOOD ADDITIVES

  • Food additives are non-naturally occurring substances added to food to improve quality, appearance, or shelf-life
  • Main categories: aroma compounds, artificial sweeteners, food colours, antioxidants, preservatives, buffering substances, stabilizers, vitamins, minerals
  • Preservatives inhibit fermentation, acidification, and decomposition by preventing microbial growth

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Full Notes

Key Concepts

A drug is a substance usedDrugs can be classified in fourMany drugs work by inhibiting enzymeReceptors are specific molecules on cellMajor drug classes include

Frequently Asked Questions

What are the important topics in Chemistry in Everyday Life for Tamil Nadu Board Class 12 Chemistry?
Key topics in Chemistry in Everyday Life include Mind map showing the definition, properties, therapeutic index concept, and classification methods of drugs, Flowchart showing how chemical structure-based classification works and the relationship between structure and biological action, Flowchart showing the difference between pharmacological effect and target system classification methods. These are the concepts Tamil Nadu Board Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in Chemistry in Everyday Life — Tamil Nadu Board Class 12 Chemistry?
Understand the core concepts first, then work through the 44 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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