1. Manufacturing – Definition and Importance
Manufacturing = Production of goods in large quantities after processing from raw materials to more valuable products. The economic strength of a country is measured by the development of manufacturing industries.
Why is Manufacturing Important?
- Helps in modernising agriculture and reduces heavy dependence of people on agricultural income by providing jobs in secondary and tertiary sectors.
- Industrial development is a precondition for eradication of unemployment and poverty. This was the main philosophy behind public sector industries and joint sector ventures in India. Also aimed at reducing regional disparities by establishing industries in tribal and backward areas.
- Export of manufactured goods expands trade and commerce, brings in much-needed foreign exchange.
- Countries that transform raw materials into finished goods of higher value are prosperous. India’s prosperity lies in increasing and diversifying its manufacturing industries.
- Agriculture and industry are not exclusive — they move hand in hand. Agro-industries boost agriculture by raising productivity. They supply irrigation pumps, fertilisers, insecticides, pesticides, plastic and PVC pipes, machines and tools to farmers.
🔵 In the globalised world
Self-sufficiency alone is not enough. Manufactured goods must be at par in quality with those in the international market to remain competitive globally.
2. Classification of Industries
| Basis | Types | Examples |
|---|---|---|
| Raw materials | Agro-based | Cotton, woollen, jute, silk textile, rubber, sugar, tea, coffee, edible oil |
| Mineral-based | Iron and steel, cement, aluminium, machine tools, petrochemicals | |
| Main role | Basic / Key industries | Supply products as raw materials to other industries — iron & steel, copper smelting, aluminium smelting |
| Consumer industries | Produce goods for direct consumer use — sugar, toothpaste, paper, sewing machines, fans | |
| Capital investment | Small scale | Maximum investment on assets = ₹1 crore |
| Ownership | Public sector | Owned and operated by government — BHEL, SAIL |
| Private sector | Owned by individuals — TISCO, Bajaj Auto Ltd., Dabur Industries | |
| Joint sector | Jointly run by state and individuals — Oil India Ltd. (OIL) | |
| Cooperative sector | Owned by producers/suppliers/workers — sugar industry in Maharashtra, coir industry in Kerala | |
| Bulk/weight | Heavy industries | Iron and steel |
| Light industries | Electrical goods industries |
3. Agro-Based Industries
Textile Industry
The textile industry occupies a unique position in the Indian economy — contributes significantly to industrial production, employment generation and foreign exchange earnings. It is the only industry in India which is self-reliant and complete in the value chain (from raw material to highest value-added products).
Fig. 6.1: Value Addition in the Textile Industry (NCERT)
Fibre Production → Spinning (Raw fibre → Yarn) → Weaving/Knitting (Yarn → Fabric) → Dyeing & Finishing → Garment Manufacture (Fabric → Garments)
Fibre Production → Spinning (Raw fibre → Yarn) → Weaving/Knitting (Yarn → Fabric) → Dyeing & Finishing → Garment Manufacture (Fabric → Garments)
Cotton Textiles
| Feature | Details |
|---|---|
| History | Ancient India: hand spinning and handloom weaving; after 18th century: power-looms came into use; suffered setback during colonial period — could not compete with mill-made cloth from England |
| First textile mill | Established in Mumbai in 1854 |
| World War boost | Two world wars created demand for cloth in UK → boost to cotton textile industry in India |
| Early concentration | Maharashtra and Gujarat (cotton growing belt) — raw cotton, market, transport, port facilities, labour, moist climate |
| Spinning | Centralised in Maharashtra, Gujarat and Tamil Nadu |
| Weaving | Highly decentralised — to incorporate traditional skills (cotton, silk, zari, embroidery); done by handloom, powerloom and mills; India has world-class spinning but weaving supplies low quality fabric |
| Khadi | Handspun khadi provides large-scale employment to weavers in their homes as a cottage industry |
| Linkages | Supports farmers, cotton boll pluckers, workers in ginning, spinning, weaving, dyeing, designing, packaging, tailoring, sewing; also supports chemicals and dyes, packaging materials and engineering works |
India: Distribution of Cotton, Woollen and Silk Industries (NCERT)
Jute Textiles
| Feature | Details |
|---|---|
| India’s rank | Largest producer of raw jute and jute goods; second place as exporter after Bangladesh |
| Location | Most mills in West Bengal, mainly along banks of the Hugli river in a narrow belt |
| First jute mill | Set up near Kolkata in 1855 at Rishra |
| Partition effect | After 1947 Partition, jute mills remained in India but three-fourths of jute producing area went to Bangladesh (erstwhile East Pakistan) |
| Hugli basin factors | Proximity to jute producing areas; inexpensive water transport; good railway, road and waterway network; abundant water for processing; cheap labour (WB, Bihar, Odisha, UP); Kolkata provides banking, insurance and port facilities for export |
Sugar Industry
| Feature | Details |
|---|---|
| India’s rank | Second world producer of sugar; First in production of gur (jaggery) and khandsari |
| Raw material | Sugarcane — bulky; loses sucrose content in haulage → mills must be near source |
| Mill states | UP, Bihar, Maharashtra, Karnataka, TN, AP, Gujarat, Punjab, Haryana, MP. 60% mills in UP and Bihar |
| Seasonal nature | Ideally suited to cooperative sector |
| Southern shift | Mills shifting to southern and western states especially Maharashtra — higher sucrose content in cane; cooler climate ensures longer crushing season; cooperatives more successful |
4. Mineral-Based Industries
Iron and Steel Industry
The basic industry since all other industries — heavy, medium and light — depend on it for machinery. Steel is needed for engineering goods, construction material, defence, medical, telephonic, scientific equipment and consumer goods. Production and consumption of steel is often regarded as the index of a country’s development.
Iron and steel is a heavy industry because all raw materials and finished goods are heavy and bulky → high transportation costs. Raw material ratio: Iron ore : Coking coal : Limestone = 4 : 2 : 1. Some manganese also needed to harden steel.
Fig. 6.2: Processes of Manufacture of Steel (NCERT)
Transport of raw material → Blast Furnace (iron ore melted; limestone as fluxing material; coke burnt; slag removed) → Pig Iron (molten metal poured into moulds called pigs) → Steel Making (pig iron purified by melting & oxidising; manganese, nickel, chromium added) → Shaping Metal (rolling, pressing, casting, forging)
Transport of raw material → Blast Furnace (iron ore melted; limestone as fluxing material; coke burnt; slag removed) → Pig Iron (molten metal poured into moulds called pigs) → Steel Making (pig iron purified by melting & oxidising; manganese, nickel, chromium added) → Shaping Metal (rolling, pressing, casting, forging)
Iron and Steel Plants in India
| Plant | State | Key Feature |
|---|---|---|
| Jamshedpur (TISCO) | Jharkhand | First private sector steel plant; established by Tata Group |
| Bhilai | Chhattisgarh | Public sector; set up with Soviet collaboration |
| Rourkela | Odisha | Public sector; set up with West German collaboration |
| Durgapur | West Bengal | Public sector; set up with British collaboration |
| Bokaro | Jharkhand | Public sector; set up with Soviet collaboration |
| Burnpur | West Bengal | Public sector; IISCO (Indian Iron and Steel Company) |
| Vishakhapatnam | Andhra Pradesh | Coastal location; uses imported raw materials |
| Vijaynagar | Karnataka | Uses local Bellary iron ore |
| Bhadravati | Karnataka | Uses Bhadravati iron ore |
| Salem | Tamil Nadu | Public sector plant |
India: Iron and Steel Plants (NCERT)
🔵 Chhotanagpur Advantage
The Chhotanagpur plateau region has the maximum concentration of iron and steel industries due to: low cost of iron ore, high grade raw materials in proximity, cheap labour and vast growth potential in the home market.
Aluminium Smelting
The second most important metallurgical industry in India. Properties: light, resistant to corrosion, good conductor of heat, malleable, becomes strong when mixed with other metals. Used in: aircraft, utensils, wires. Has gained popularity as a substitute of steel, copper, zinc and lead.
Two prime factors for location: regular supply of electricity + assured raw material at minimum cost.
Fig. 6.4 & 6.5: Aluminium Manufacturing Process (NCERT)
4–6 tonnes bauxite → 2 tonnes alumina → 1 tonne aluminium. Process: Bauxite quarry → (rail/ship) → Aluminium Refinery (bauxite crushed, alumina dissolved) → Aluminium Smelter (with cryolite as electrolyte, 18,600 kWh electricity per tonne)
4–6 tonnes bauxite → 2 tonnes alumina → 1 tonne aluminium. Process: Bauxite quarry → (rail/ship) → Aluminium Refinery (bauxite crushed, alumina dissolved) → Aluminium Smelter (with cryolite as electrolyte, 18,600 kWh electricity per tonne)
| Feature | Details |
|---|---|
| Raw material | Bauxite — bulky, dark reddish coloured rock |
| Conversion ratio | 4–6 tonnes bauxite → 2 tonnes alumina → 1 tonne aluminium |
| Electricity needed | 18,600 KWh per tonne of ore |
| Electrolyte used | Cryolite — a molten metal acts as an electrolyte |
| Smelting plant states | Odisha, West Bengal, Kerala, Uttar Pradesh, Chhattisgarh, Maharashtra, Tamil Nadu |
Chemical Industries
| Type | Examples | Uses |
|---|---|---|
| Inorganic | Sulphuric acid, nitric acid, alkalies, soda ash, caustic soda | Fertilizers, synthetic fibres, plastics, adhesives, paints, dyes; glass, soaps, detergents, paper |
| Organic (Petrochemicals) | Located near oil refineries/petrochemical plants | Synthetic fibres, synthetic rubber, plastics, dye-stuffs, drugs and pharmaceuticals |
The chemical industry is its own largest consumer. Basic chemicals undergo processing to produce other chemicals for industrial application, agriculture or consumer markets.
Fertilizer Industry
| Feature | Details |
|---|---|
| Products | Nitrogenous fertilizers (mainly urea), phosphatic fertilizers, ammonium phosphate (DAP), complex fertilizers (N, P, K) |
| Potash | Entirely imported — India has no reserves of commercially usable potash or potassium compounds |
| Top producers | Gujarat, Tamil Nadu, UP, Punjab, Kerala → contribute about half of fertilizer production |
| Others | AP, Odisha, Rajasthan, Bihar, Maharashtra, Assam, WB, Goa, Delhi, MP, Karnataka |
| Expansion | Expanded to many parts after the Green Revolution |
Cement Industry
Essential for construction — houses, factories, bridges, roads, airports, dams, commercial establishments. Requires bulky heavy raw materials: limestone, silica, gypsum. Also needs coal, electric power and rail transportation. The first cement plant was set up in Chennai in 1904. Gujarat plants have suitable access to Gulf countries market.
Automobile Industry
Provides vehicles for quick transport of goods, services and passengers. Post-liberalisation, new contemporary models stimulated demand. Located around: Delhi, Gurugram, Mumbai, Pune, Chennai, Kolkata, Lucknow, Indore, Hyderabad, Jamshedpur and Bengaluru.
Information Technology and Electronics Industry
| Feature | Details |
|---|---|
| Products | Transistor sets, television, telephones, cellular telecom, telephone exchange, radars, computers, telecommunication equipment |
| Electronic capital of India | Bengaluru |
| Other important centres | Mumbai, Delhi, Hyderabad, Pune, Chennai, Kolkata, Lucknow, Coimbatore |
| Major concentration | Bengaluru, Noida, Mumbai, Chennai, Hyderabad, Pune |
| Key to IT success | Continuing growth in hardware and software; major impact on employment generation |
India: Some Software Technology Parks (NCERT)
5. Industrial Pollution and Environmental Degradation
Industries are responsible for four types of pollution: Air, Water, Land, Noise. The polluting industries also include thermal power plants.
| Type | Causes | Effects |
|---|---|---|
| Air Pollution | High proportion of sulphur dioxide, carbon monoxide; airborne particulates (dust, sprays, mist, smoke); smoke from chemical and paper factories, brick kilns, refineries, smelting plants, burning fossil fuels | Adversely affects human health, animals, plants, buildings and atmosphere. Toxic gas leaks (e.g. Bhopal Gas Tragedy) can be hazardous with long-term effects |
| Water Pollution | Organic and inorganic industrial wastes discharged into rivers; main culprits: paper, pulp, chemical, textile, dyeing, petroleum refineries, tanneries, electroplating — let out dyes, detergents, acids, salts, heavy metals (lead, mercury), pesticides, fertilisers | Fly ash, phospo-gypsum, iron and steel slags are major solid wastes in India. Thermal pollution: hot water from factories drained into rivers before cooling |
| Land Pollution | Dumping of glass, harmful chemicals, industrial effluents, packaging, salts, garbage | Renders soil useless; rainwater percolates carrying pollutants → groundwater contamination |
| Noise Pollution | Industrial and construction activities, machinery, factory equipment, generators, saws, pneumatic and electric drills | Irritation, anger, hearing impairment, increased heart rate and blood pressure |
⚠️ Key Fact
Every litre of waste water discharged by industry pollutes eight times the quantity of freshwater. Wastes from nuclear power plants cause cancers, birth defects and miscarriages.
Control of Environmental Degradation
| Measure | Method |
|---|---|
| Water conservation | Minimise water use; reuse and recycle in two or more successive stages; harvest rainwater |
| Effluent treatment (3 phases) | (a) Primary: mechanical — screening, grinding, flocculation, sedimentation (b) Secondary: biological process (c) Tertiary: biological, chemical and physical — involves recycling of wastewater |
| Air pollution control | Fit smoke stacks with electrostatic precipitators, fabric filters, scrubbers and inertial separators; use oil or gas instead of coal; redesign machinery |
| Noise control | Fit generators with silencers; use noise absorbing materials; personal earplugs/earphones |
| Legal | Regulate overdrawing of groundwater reserves legally |
📗 NTPC shows the way (NCERT Sidebar)
NTPC has ISO certification for EMS (Environment Management System) 14001. Proactive approach for preserving natural environment and resources. Achieves this through: (a) Optimum utilisation of equipment with latest techniques; (b) Minimising waste by maximising ash utilisation; (c) Providing green belts; (d) Reducing environmental pollution through ash pond management, ash water recycling, liquid waste management; (e) Ecological monitoring, reviews and online database management for all power stations.
6. NCERT Exercise Answers + Activity Solutions
MCQ Answers
- Industry that uses bauxite as raw material: (a) Aluminium Smelting
- Industry that manufactures telephones, computers: (b) Electronic (IT industry provides the software/service component)
Activity – One Word Answers
| Clue | Answer |
|---|---|
| Used to drive machinery (5 letters) | POWER |
| People who work in a factory (6 letters) | WORKER |
| Where the product is sold (6 letters) | MARKET |
| A person who sells goods (8 letters) | RETAILER |
| Thing produced (7 letters) | PRODUCT |
| To make or produce (11 letters) | MANUFACTURE |
| Land, Water and Air degraded (9 letters) | POLLUTION |
Puzzle / Word Search Answers (NCERT Activity)
| # | Clue | Answer |
|---|---|---|
| 1 | Textiles, sugar, vegetable oil and plantation industries deriving raw materials from agriculture are called… | AGROBASED |
| 2 | The basic raw material for sugar industry | SUGARCANE |
| 3 | This fibre is also known as the ‘Golden Fibre’ | JUTE |
| 4 | Iron-ore, coking coal, and limestone are the chief raw materials of this industry | IRON STEEL |
| 5 | A public sector steel plant located in Chhattisgarh | BHILAI |
| 6 | Railway diesel engines are manufactured in Uttar Pradesh at this place | VARANASI |
📝 Practice MCQs – UPSC / State PCS Standard
Q1. The textile industry is the only industry in India that is self-reliant and complete in the value chain. What does this value chain progress from?
- A. Spinning to garment manufacture only
- B. Raw material (fibre production) to the highest value-added products (garments)
- C. Weaving to dyeing and finishing
- D. Cotton cultivation to retail sale
✅ Answer: B | As per NCERT: the textile industry is the only industry “self-reliant and complete in the value chain i.e., from raw material to the highest value added products.”
Q2. The first jute mill in India was set up at Rishra near Kolkata in 1855. After Partition (1947), what happened to the jute sector?
- A. Jute mills moved to East Pakistan along with jute growing areas
- B. Jute mills remained in India but three-fourths of jute producing area went to Bangladesh (erstwhile East Pakistan)
- C. India became the largest jute exporter after Partition
- D. Jute production shifted entirely to West Bengal
✅ Answer: B | This is a classic UPSC-relevant fact — jute mills remained in India but most of the raw material growing area went to Bangladesh, creating a structural challenge for the Indian jute industry.
Q3. What is the approximate ratio of iron ore, coking coal and limestone required for iron and steel production?
- A. 2:1:4
- B. 1:2:4
- C. 4:2:1
- D. 3:3:1
✅ Answer: C | NCERT states: Iron ore : Coking coal : Limestone = approximately 4:2:1. Iron is most, limestone is least. Some manganese is also required to harden the steel.
Q4. In the aluminium manufacturing process, how much electricity is required per tonne of ore in the smelter?
- A. 5,000 KWh
- B. 10,000 KWh
- C. 18,600 KWh
- D. 25,000 KWh
✅ Answer: C | The smelter requires 18,600 KWh per tonne of ore. This is why regular and cheap electricity supply is the prime factor for aluminium smelter location. Cryolite acts as the electrolyte.
Q5. India is the largest producer of raw jute but only second largest exporter. Which country leads in jute exports?
- A. China
- B. Bangladesh
- C. Myanmar
- D. Thailand
✅ Answer: B | NCERT: India is largest producer of raw jute and jute goods and stands at second place as an exporter after Bangladesh.
Q6. Which of the following is NOT a reason why the sugar industry is shifting from UP-Bihar to Maharashtra?
- A. Higher sucrose content in sugarcane in Maharashtra
- B. Cooler climate ensures longer crushing season
- C. Cooperatives are more successful in Maharashtra
- D. Maharashtra has abundant water for irrigation
✅ Answer: D | The three NCERT-stated reasons for shift to Maharashtra are: higher sucrose content, cooler climate (longer crushing season), and more successful cooperatives. Water abundance is not a stated reason.
Q7. NTPC has ISO certification for EMS 14001. What does EMS stand for?
- A. Electrical Management System
- B. Environment Management System
- C. Energy Monitoring System
- D. Emission Mitigation Strategy
✅ Answer: B | NCERT sidebar states NTPC has ISO certification for EMS (Environment Management System) 14001 with a proactive approach for preserving natural environment and resources.
Q8. The fertilizer industry produces N, P, K fertilizers. Which of the following is entirely imported by India?
- A. Nitrogen (N)
- B. Phosphate (P)
- C. Potash (K)
- D. All three are imported
✅ Answer: C | NCERT explicitly states: “Potash is entirely imported as the country does not have any reserves of commercially usable potash or potassium compounds in any form.”
Q9. Bengaluru has emerged as the electronic capital of India. Where was the first cement plant in India set up?
- A. Mumbai
- B. Kolkata
- C. Chennai
- D. Ahmedabad
✅ Answer: C | The first cement plant was set up in Chennai in 1904. After Independence the industry expanded. Bengaluru is the electronic capital.
Q10. The treatment of industrial effluents is done in three phases. Which treatment involves recycling of wastewater?
- A. Primary treatment (mechanical)
- B. Secondary treatment (biological)
- C. Tertiary treatment (biological, chemical and physical)
- D. All three phases equally
✅ Answer: C | Tertiary treatment by biological, chemical and physical processes involves recycling of wastewater. Primary = screening, grinding, flocculation, sedimentation. Secondary = biological process only.
