Class 10 Social Science Notes — Chapter 10: Manufacturing Industries
Role, types, distribution, and pollution control in Indian industries.
Detailed NCERT notes
- Manufacturing = producing goods in large quantities after processing raw materials into more valuable products.
- Role of manufacturing: raises value of raw materials, provides employment, reduces dependence on agriculture, boosts exports, aids modernisation.
- Classification:
- Agro-based industries — use agricultural raw materials (cotton textiles, sugar, jute, tea, coffee, edible oils, silk).
- Mineral-based industries — use minerals (iron and steel, aluminium smelting, cement, petrochemicals).
- Others — based on scale, ownership (public, private, joint, cooperative), raw material weight.
- Cotton textile industry: earliest modern industry (Bombay 1854). Concentrated in Maharashtra, Gujarat, Tamil Nadu; suffers from outdated machinery, competition from synthetic textiles.
- Jute industry: mostly in Hooghly belt (WB); challenges — synthetic substitutes, ageing mills.
- Sugar industry: shifting from north to south (Maharashtra, Karnataka, Tamil Nadu) due to better sucrose in sugarcane and cooperatives.
- Iron and steel industry: 'backbone' of modern industry; TISCO (Jamshedpur — private, near coal, iron, port), Bhilai, Rourkela, Durgapur, Bokaro (public sector, near mineral belts); Visvesvaraya (Bhadravati) and Salem in south.
- Aluminium smelting: Odisha (NALCO), Chhattisgarh (BALCO), Jharkhand; needs bauxite + power.
- Chemical industries: rapidly growing; fertilisers, petrochemicals, plastics; located near ports/petroleum sources (Gujarat, Maharashtra, Andhra Pradesh).
- Automobile industry: NCR, Chennai (Detroit of India), Pune, Jamshedpur; boom after liberalisation (1991).
- IT/electronics: Bengaluru, Hyderabad, Pune, NCR; STPI parks.
- Industrial pollution: air (SO₂, NOₓ, PM), water (chemicals, hot water), soil (waste dumping), noise, thermal.
- Control measures: minimising water use, treatment of effluents, particulate control (bag filters, scrubbers), rainwater harvesting, cleaner production and NGT enforcement.
- Location factors: raw materials, labour, capital, power, market, transport, government incentives; often more than one factor decides it.
Formulas & key results
Mind map
- Agro-based vs mineral-based industries
- Iron & steel, cotton, sugar, jute — major sectors
- Location factors
- Pollution and control
Tricks & shortcuts
- Iron & steel = 'backbone' of modern industry.
- TISCO (Tata) = Jamshedpur; Bhilai = public sector.
Common mistakes to avoid
- Confusing raw-material orientation with market orientation.
- Mixing Bhilai (steel) with Bhilwara (textiles).
Competency-based questions & answers
- Q. Why are TISCO plants located in the Jamshedpur region?A. Proximity to Jharia (coal), Odisha (iron), Kolkata port, water (Subarnarekha), cheap labour and rail network — a rare cluster of all key inputs.
- Q. How do industries pollute freshwater?A. By dumping organic and inorganic effluents, dyes and heavy metals into rivers, and by discharging heated water that lowers dissolved oxygen.