Important Questions – Role of Chemistry in Daily Life

Manonmaniam Sundaranar University | B.Sc. Chemistry | 2nd Semester | April 2026

B.Sc. Chemistry students க்கு மிகவும் important ஆன paper தான் “Role of Chemistry in Daily Life”. இந்த subject ல water treatment, plastics, fertilizers, pharmaceuticals, soap manufacture, dyes மற்றும் explosives போன்ற topics இருந்து repeated questions அதிகமாக கேட்கப்படுகிறது.

இந்த post ல syllabus analysis மற்றும் previous year university question papers அடிப்படையில் unit-wise important questions, repeated questions, expected 5 marks & 8 marks questions, MCQ topics மற்றும் exam preparation tips கொடுக்கப்பட்டுள்ளது.

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Exam Pattern Overview

• Part A: Objective / MCQ questions
• Part B: Short answer questions (5 marks)
• Part C: Essay / long answer questions (8 marks)

Students முக்கியமாக repeated Part C questions மீது focus செய்தால் high marks score செய்யலாம்.

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UNIT I – Air & Water

இந்த unit ல environmental chemistry, composition of air, water quality, pollution மற்றும் water treatment methods போன்ற topics cover செய்யப்படுகிறது. Greenhouse gases மற்றும் hardness of water questions மிகவும் important.

Part B (5 Marks)

• Water quality parameters & WHO standards for potable water ⭐⭐
• Removal of hardness by reverse osmosis
• Sources of water pollution / primary sources
• Photosynthesis process

Part C (8 Marks)

• Composition of air and its importance ⭐⭐
• Greenhouse gases – effects on environment & human health ⭐⭐
• Methods of removal of hardness of water ⭐⭐
• Sources of water & impact of water pollution on marine life

Important Topics to Revise

• Temporary and permanent hardness
• WHO drinking water standards
• Acid rain and greenhouse effect
• Marine pollution effects

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UNIT II – Building Materials & Plastics

இந்த unit ல cement, glass, ceramics மற்றும் plastics பற்றிய manufacture மற்றும் industrial applications கேட்கப்படும்.

Part B (5 Marks)

• Thermoplastics vs thermosetting plastics ⭐⭐
• Preparation and uses of PVC ⭐
• Preparation and uses of polyester
• Glass manufacture and uses

Part C (8 Marks)

• Portland cement – manufacture ⭐⭐
• Ceramics – raw materials & manufacture ⭐
• Composition & applications of Glass and Refractories
• Phenol formaldehyde resin & Melamine formaldehyde resin ⭐

Most Expected Diagram

• Manufacture of Portland cement – flow chart diagram ⭐⭐

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UNIT III – Food & Nutrition / Cosmetics

இந்த unit ல food constituents, calorific value, cosmetics மற்றும் soap preparation topics முக்கியமாக கேட்கப்படும்.

Part B (5 Marks)

• Functions of food ⭐
• Proteins – definition and importance as food constituents
• Preparation and uses of nail polish ⭐
• Harmful effects of cosmetic products

Part C (8 Marks)

• Soap – raw materials and manufacture ⭐⭐
• Calorific value of food – significance, values of carbohydrates/fats/proteins ⭐
• Preparation and uses of Toothpaste & Face powder ⭐⭐
• Preparation and uses of Toothpaste & Shampoo ⭐⭐

Important Definitions

• Balanced diet
• Calorific value
• Saponification reaction
• Cosmetic preservatives

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UNIT IV – Chemicals in Food Production / Fuels

இந்த unit agriculture chemistry மற்றும் industrial chemistry concepts அடிப்படையில் இருக்கும். Fertilizers மற்றும் fuels topics repeated ஆக கேட்கப்படும்.

Part B (5 Marks)

• Role of nitrogen on plant growth ⭐⭐
• Urea – manufacture and uses ⭐⭐
• NPK fertilizers – preparation and uses ⭐
• Nuclear fuels – definition and examples

Part C (8 Marks)

• What are fertilizers? Characteristics of good fertilizers ⭐⭐
• Role of nitrogen, phosphorus and potassium on plant growth ⭐⭐
• Classification of fuels ⭐
• Preparation and uses of Urea & Superphosphate ⭐

Important Points

• Functions of NPK nutrients
• Advantages of fertilizers
• Types of fuels
• Examples of nuclear fuels

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UNIT V – Pharmaceuticals, Dyes & Explosives

இந்த unit மிகவும் scoring unit ஆகும். குறிப்பாக Paracetamol, Aspirin மற்றும் explosives questions repeated ஆக வருகிறது.

Part B (5 Marks)

• Analgesics – definition and examples ⭐⭐
• Analgesics vs antipyretics ⭐
• Preparation and uses of Paracetamol ⭐⭐
• Dyes – definition and applications

Part C (8 Marks)

• Pigments and Dyes ⭐⭐
• Preparation and uses of Paracetamol & Aspirin ⭐⭐
• Explosives – classification with two examples each ⭐⭐
• Colour chemicals – pigments and dyes

Most Important Drug Chemistry Topics

• Analgesics and antipyretics
• Classification of explosives
• Azo dyes and anthraquinone dyes
• Medicinal applications of aspirin

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Part A – Most Repeated MCQ Topics

Topic	Answer
Greenhouse gas NOT included	Hydrogen
Permanent hardness caused by	Magnesium sulphate
Aspirin chemical name	Acetylsalicylic acid
Richest energy source	Fat
Shampoo main ingredient	Sodium lauryl sulphate
Nail polish main ingredient	Nitrocellulose
% Nitrogen in urea	46–47%
Common nuclear fuel	U-235
Narcotic analgesic example	Morphine
Azo dye example	Methyl orange
Alizarin dye type	Anthraquinone

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Top 5 “Sure Shot” Questions ⭐⭐

1. Methods of removal of hardness of water
2. Manufacture of Portland cement
3. Soap manufacture
4. Preparation & uses of Paracetamol and Aspirin
5. Classification of explosives with examples

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How to Score High Marks

• Repeated 8-mark questions முழுமையாக prepare செய்யவும்.
• Important diagrams மற்றும் flow charts practice செய்யவும்.
• Part A MCQ definitions மற்றும் examples revise செய்யவும்.
• Preparation methods மற்றும் industrial applications படிக்கவும்.
• Previous 5 years university question papers practice செய்யவும்.

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Conclusion

April 2026 examination எழுதும் students repeated university questions, important diagrams மற்றும் preparation methods மீது focus செய்தால் நல்ல marks பெற முடியும்.

Regular revision மற்றும் previous year question paper practice மிகவும் அவசியம்.

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Disclaimer

This question prediction is prepared based on previous year university question papers, commonly repeated topics and syllabus analysis of Manonmaniam Sundaranar University B.Sc. Chemistry syllabus. These questions are only for study guidance and revision purposes. MH Educational Blog exact university questions guarantee செய்யாது. Students complete syllabus prepare செய்வது அவசியம்.