About This Chapter
Class 10 Geography Chapter 6, Manufacturing Industries, from NCERT Contemporary India–II explains how raw materials are transformed into more valuable finished products. It discusses the importance of manufacturing in economic development, classification of industries, agro-based and mineral-based industries, major manufacturing sectors in India, and the environmental problems caused by industrial activities.
These notes follow the main topics and terminology of the supplied NCERT chapter, including its exercise questions. Suggested answers are provided in student-friendly language for revision and examination practice.
Learn the meaning and importance of manufacturing.
Understand different types of industries.
Revise major industries and their locations.
Attempt NCERT questions and the final test.
- Define manufacturing and explain its importance.
- Classify industries by raw materials, role, ownership and weight.
- Describe cotton textiles, jute textiles and the sugar industry.
- Explain iron and steel, aluminium, chemical, fertiliser and cement industries.
- Understand the automobile and information technology industries.
- Identify the main types of industrial pollution and measures to control them.
Manufacturing Industries
Complete Chapter Notes, Important Questions, NCERT Exercise Solutions and Quick Revision
Understand the importance of manufacturing, types of industries, major industrial sectors in India, industrial pollution and measures to control environmental degradation.
Start Learning ↓ Practice Questions Quick RevisionRead the topic-wise notes, practise the model answers and complete the revision checklist before your examination.
1. Meaning of Manufacturing
Manufacturing is the production of goods in large quantities after processing raw materials into more valuable products.
For example, paper is manufactured from wood, sugar from sugarcane, iron and steel from iron ore, and aluminium from bauxite. Some clothes are manufactured from yarn, which is itself an industrial product.
Examples of manufacturing
Manufactured product: Paper
Manufactured product: Sugar
Manufactured product: Iron and steel
Manufactured product: Aluminium
Primary, secondary and tertiary activities
| Sector | What it does | Examples |
|---|---|---|
| Primary | Obtains products directly from natural resources. | Agriculture, fishing and mining. |
| Secondary | Processes raw materials into manufactured goods. | Textile mills, steel plants and sugar factories. |
| Tertiary | Provides services that support people and economic activities. | Transport, banking, insurance and trade. |
Exam Practice
NCERTQ1. What is manufacturing? (2 marks)
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Q2. Why is manufacturing considered a secondary activity? (2 marks)
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2. Importance of Manufacturing Industries
The manufacturing sector is considered the backbone of economic development. The development of manufacturing industries is an important indicator of a country's economic strength.
Why is manufacturing important?
Industries supply farmers with irrigation pumps, fertilisers, insecticides, pesticides, machines and tools.
Manufacturing provides jobs in the secondary sector and creates work in related service activities.
Industrial development can create employment opportunities and reduce heavy dependence on agricultural income.
Exports of manufactured goods expand trade and bring foreign exchange.
Processing raw materials into finished products can increase their economic value.
Establishing industries in tribal and backward areas can support more balanced regional development.
Relationship between agriculture and industry
Agriculture and industry are not separate from each other. They support one another. Agro-based industries depend on agriculture for raw materials, while industries provide farmers with equipment and inputs that can increase productivity.
Manufacturing and globalisation
In a globalised world, Indian industries need to be efficient and competitive. Manufactured goods must meet quality standards to compete in international markets. Self-sufficiency alone is not enough to ensure success in global trade.
Exam Practice
Q1. Explain any three reasons why manufacturing is important for the Indian economy. (3 marks)
Show answer
- Manufacturing modernises agriculture by providing machinery, pumps and fertilisers.
- It creates employment and reduces excessive dependence on agricultural income.
- It expands exports, earns foreign exchange and supports economic growth.
Q2. Explain how agriculture and industry move hand in hand. (3 marks)
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Q3. Why must Indian industries become more competitive? (2 marks)
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3. Classification of Industries
Industries can be classified according to the raw materials they use, their main role, capital investment, ownership, and the bulk and weight of raw materials and finished products.
A. On the basis of raw materials
| Type | Meaning | Examples from the chapter |
|---|---|---|
| Agro-based | Use agricultural products as raw materials. | Cotton, woollen, jute and silk textiles; sugar; tea; coffee; edible oil. |
| Mineral-based | Use minerals and metals as raw materials. | Iron and steel, cement, aluminium, machine tools and petrochemicals. |
B. According to their main role
| Type | Meaning | Examples |
|---|---|---|
| Basic or key industries | Supply products that are used as raw materials by other industries. | Iron and steel, copper smelting and aluminium smelting. |
| Consumer industries | Produce goods for direct use by consumers. | Sugar, toothpaste, paper, sewing machines and fans. |
C. On the basis of capital investment
D. On the basis of ownership
| Type | Ownership | Examples in the textbook |
|---|---|---|
| Public sector | Owned and operated by government agencies. | BHEL and SAIL. |
| Private sector | Owned and operated by individuals or groups of individuals. | TISCO, Bajaj Auto Ltd. and Dabur Industries. |
| Joint sector | Jointly run by the government and private individuals or groups. | Oil India Ltd. (OIL), as described in the textbook. |
| Cooperative sector | Owned and operated by producers, suppliers of raw materials, workers or both, who share profits and losses. | Sugar industry in Maharashtra and coir industry in Kerala. |
E. On the basis of weight and bulk
| Type | Features | Example |
|---|---|---|
| Heavy industries | Use heavy and bulky raw materials or produce heavy and bulky goods. | Iron and steel. |
| Light industries | Use light raw materials and produce light goods. | Electrical goods industries. |
NCERT Activity: Heavy or Light?
| Item | Suggested group | Reason |
|---|---|---|
| Oil | Depends on the type and context | Bulk and transport requirements vary by product and processing stage. |
| Knitting needles | Light | Small, light finished goods. |
| Brassware | Generally light | Small brass products are relatively easy to handle. |
| Fuse wires | Light | Small electrical components. |
| Watches | Light | Small finished products. |
| Sewing machines | Relatively light | Much smaller than heavy industrial equipment. |
| Shipbuilding | Heavy | Ships are extremely large and heavy. |
| Electric bulbs | Light | Small, lightweight products. |
| Paint brushes | Light | Small consumer goods. |
| Automobiles | Heavy | Finished vehicles are large and heavy. |
The oil example may be interpreted differently depending on whether the activity refers to raw material bulk, industrial processing or finished products. Follow the classification intended by your teacher.
Exam Practice
NCERTQ1. What are basic industries? Give an example. (2 marks)
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Q2. Differentiate between public-sector and private-sector industries. (2 marks)
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Q3. Differentiate between agro-based and mineral-based industries. (2 marks)
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4. Textile Industry
The textile industry occupies a unique position in the Indian economy. According to the textbook, it contributes significantly to industrial production, employment generation and foreign exchange earnings. It is described as self-reliant and complete in its value chain, from raw material to high-value finished products.
Cotton textile industry
In ancient India, cotton textiles were produced using hand spinning and handloom weaving. After the eighteenth century, power looms came into use. Traditional industries faced setbacks during the colonial period because they could not compete with mill-made cloth from England.
- The first successful cotton textile mill was established in Mumbai in 1854.
- During the two World Wars, demand for cloth gave a boost to the development of India's cotton textile industry.
- In the early years, the industry was concentrated in the cotton-growing belt of Maharashtra and Gujarat.
Factors affecting the location of cotton textile mills
Availability of raw cotton in nearby agricultural areas.
Access to consumers and markets for finished cloth.
Road, rail and port facilities for moving materials and goods.
Availability of workers and suitable climatic conditions.
Spinning and weaving
Spinning converts fibres into yarn. Weaving or knitting converts yarn into fabric. Dyeing, designing, finishing, packaging, tailoring and sewing add further value.
The textbook explains that spinning is relatively centralised in Maharashtra, Gujarat and Tamil Nadu, while weaving is highly decentralised. Weaving takes place through handloom, powerloom and mill-based systems.
Handloom, powerloom and mill sector
| Type | Features |
|---|---|
| Handloom | Uses hand-operated looms and can support traditional weaving skills and cottage industries. |
| Powerloom | Uses mechanical power to weave fabric. |
| Mill sector | Uses industrial-scale facilities for textile production. |
| Khadi | Handspun and handwoven fabric associated with cottage production and employment in homes. |
Why did Mahatma Gandhi emphasise khadi?
Khadi and hand spinning became symbols of self-reliance and the Swadeshi movement. Promoting locally produced cloth helped support Indian workers and challenged dependence on imported mill-made textiles.
Exam Practice
Q1. Why does the textile industry occupy a unique position in the Indian economy? (3 marks)
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Q2. Why did Mahatma Gandhi lay emphasis on spinning yarn and weaving khadi? (3 marks)
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Q3. Explain four factors responsible for the location of cotton textile industries. (4 marks)
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- Availability of raw cotton.
- Access to markets for finished products.
- Efficient transport and port facilities.
- Availability of labour and suitable climatic conditions.
5. Jute Textile Industry
Jute is known as the Golden Fibre. The textbook states that India is the largest producer of raw jute and jute goods and stands second as an exporter after Bangladesh in the context of the supplied edition.
Location of jute mills
Most jute mills are located in West Bengal, mainly along the banks of the Hugli River in a narrow belt.
- The first jute mill was established near Kolkata in 1855 at Rishra.
- After Partition in 1947, jute mills remained in India, while a large part of the jute-producing area went to East Pakistan, now Bangladesh.
Factors responsible for the concentration of jute mills along the Hugli
Proximity to jute-producing areas.
Access to inexpensive water transport.
A good network for moving raw jute to mills and finished goods to markets.
Abundant processing water and labour from West Bengal and neighbouring states.
Kolkata provides banking, insurance and port facilities.
Exam Practice
Q1. Why are most jute mills concentrated along the Hugli River? (4 marks)
Show answer
- The region is close to jute-producing areas.
- It has inexpensive water transport and a good rail and road network.
- Abundant water is available for processing raw jute.
- Labour is available from West Bengal and adjoining states, while Kolkata provides banking, insurance and port facilities.
Q2. Why is jute called the Golden Fibre? (1 mark)
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6. Sugar Industry
The sugar industry is an important agro-based industry because sugarcane is its principal raw material. The textbook notes that sugarcane is bulky and its sucrose content decreases during transportation and storage, so mills need to be located conveniently near cane-producing areas.
Important characteristics
- Sugar production is seasonal because sugarcane is harvested during a particular period.
- The industry is well suited to the cooperative sector in regions where sugarcane farmers can organise processing and share benefits.
- The textbook lists mills in Uttar Pradesh, Bihar, Maharashtra, Karnataka, Tamil Nadu, Andhra Pradesh, Gujarat, Punjab, Haryana and Madhya Pradesh.
- It notes a tendency for mills to shift towards southern and western states, especially Maharashtra, because of higher sucrose content in cane, a cooler climate and a longer crushing season.
Why is the cooperative sector suitable for sugar mills?
Sugarcane is a seasonal crop, and many farmers supply the raw material. Cooperatives allow producers to pool resources, participate in the processing industry and share profits or losses proportionately.
Exam Practice
Q1. Why is the sugar industry ideally suited to the cooperative sector? (3 marks)
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Q2. Why have some sugar mills shifted towards southern and western India? (3 marks)
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7. Iron and Steel Industry
The iron and steel industry is a basic industry because other industries—heavy, medium and light—depend on it for machinery and equipment. Steel is used in engineering goods, construction materials, defence equipment, medical equipment, telephones, scientific instruments and consumer goods.
Production and consumption of steel are often regarded as indicators of a country's development.
Why is iron and steel a heavy industry?
Both the raw materials and the finished products are heavy and bulky, which leads to high transportation costs.
| Raw material | Approximate ratio given in the textbook | Role |
|---|---|---|
| Iron ore | 4 | Provides iron for steel production. |
| Coking coal | 2 | Provides fuel and is used in the conventional steelmaking process. |
| Limestone | 1 | Acts as a flux in the blast furnace. |
The textbook also mentions that some manganese is required to harden steel.
Process of manufacturing steel
In the conventional process illustrated in the textbook, iron ore is melted, limestone and material are charged into the furnace, and coke is burnt to heat the ore. Molten material is poured into moulds to form pig iron. Pig iron is then further processed to make steel, with other elements added as required.
Factors affecting the location of steel plants
- Low-cost iron ore and access to other raw materials.
- Availability of coking coal, limestone and manganese.
- Reliable water and power supply.
- Availability of labour.
- Efficient transport for incoming raw materials and outgoing finished products.
- Access to markets and potential for industrial growth.
Chota Nagpur Plateau region
The textbook identifies the Chota Nagpur Plateau as having the maximum concentration of iron and steel industries. Advantages include low-cost iron ore, high-grade raw materials nearby, cheap labour and a large potential home market.
Exam Practice
Q1. Why is the iron and steel industry called a basic industry? (2 marks)
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Q2. Explain four factors affecting the location of iron and steel plants. (4 marks)
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- Availability of iron ore and other raw materials at low cost.
- Availability of coking coal, limestone and manganese.
- Reliable power, water and labour supplies.
- Efficient transport links for heavy raw materials and finished steel products.
Q3. Why is steel production considered an indicator of development? (2 marks)
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8. Aluminium Smelting
Aluminium smelting is described in the textbook as the second most important metallurgical industry in India.
Properties and uses of aluminium
Useful where low weight is important.
Resists corrosion in many conditions.
Conducts heat and electricity.
Can be shaped into sheets and other forms.
Aluminium is used in aircraft, utensils and wires. It is also used as a substitute for steel, copper, zinc and lead in a number of industries.
Raw material and process
Bauxite is the raw material used in aluminium smelters. The textbook's process diagram shows bauxite being processed to obtain alumina, which is then used to produce aluminium through smelting.
Factors affecting the location of aluminium smelting plants
- Regular and reliable electricity supply.
- An assured supply of bauxite at minimum cost.
- Transport facilities for raw materials and finished products.
The textbook lists aluminium smelting plants in Odisha, West Bengal, Kerala, Uttar Pradesh, Chhattisgarh, Maharashtra and Tamil Nadu.
Exam Practice
NCERT MCQQ1. Which industry uses bauxite as a raw material? (1 mark)
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Q2. Why is regular electricity supply essential for aluminium smelting? (2 marks)
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Q3. Mention three properties of aluminium that make it useful. (3 marks)
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9. Chemical Industry
The chemical industry in India is described as fast-growing and diversified. It includes both large and small-scale manufacturing units and both inorganic and organic chemical industries.
Inorganic chemicals
| Chemical | Uses described in the textbook |
|---|---|
| Sulphuric acid | Used to manufacture fertilisers, synthetic fibres, plastics, adhesives, paints and dyes. |
| Nitric acid | An important industrial chemical used in several manufacturing processes. |
| Alkalies | Used in chemical manufacturing. |
| Soda ash | Used to make glass, soaps, detergents and paper. |
| Caustic soda | Used in industrial chemical processes. |
Organic chemicals
Organic chemicals include petrochemicals used in manufacturing synthetic fibres, synthetic rubber, plastics, dyestuffs, drugs and pharmaceuticals.
The textbook explains that organic chemical plants are often located near oil refineries or petrochemical plants.
Why is the chemical industry widely spread?
Chemicals are used as raw materials by a large number of industries and in agriculture. The chemical industry also supplies products directly to consumers. Its wide range of applications encourages its spread across different regions.
Exam Practice
Q1. Differentiate between organic and inorganic chemical industries. (3 marks)
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Q2. Why are organic chemical plants often located near oil refineries or petrochemical plants? (2 marks)
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10. Fertiliser Industry
The fertiliser industry produces nutrients needed for plant growth. The textbook discusses nitrogenous fertilisers, mainly urea; phosphatic fertilisers; ammonium phosphate or DAP; and complex fertilisers that combine nitrogen (N), phosphate (P) and potash (K).
Main types of fertilisers
| Type | Key point |
|---|---|
| Nitrogenous | Mainly includes urea. |
| Phosphatic | Supplies phosphate nutrients. |
| DAP | Diammonium phosphate, an important fertiliser discussed in the chapter. |
| Complex fertilisers | Contain a combination of nutrients such as nitrogen, phosphate and potash. |
The supplied textbook states that potash is entirely imported because India does not have reserves of commercially usable potash or potassium compounds.
Location and development
The textbook explains that the fertiliser industry expanded into several parts of India after the Green Revolution. It lists Gujarat, Tamil Nadu, Uttar Pradesh, Punjab and Kerala among the contributors to fertiliser production, alongside other producing states.
Exam Practice
Q1. What are complex fertilisers? (2 marks)
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Q2. What are the main types of fertilisers mentioned in the chapter? (3 marks)
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11. Cement Industry
Cement is essential for construction activities such as building houses, factories, bridges, roads, airports, dams and commercial establishments.
Raw materials and requirements
| Requirement | Importance |
|---|---|
| Limestone | A major raw material used in cement production. |
| Silica | One of the important raw materials mentioned in the chapter. |
| Gypsum | Used in cement manufacture. |
| Coal and electricity | Provide energy for manufacturing. |
| Rail transport | Helps move bulky raw materials and finished cement. |
The textbook notes that the first cement plant was set up in Chennai in 1904. After Independence, the industry expanded. It also mentions strategically located plants in Gujarat with access to markets in Gulf countries.
Where should cement factories be located?
Cement plants are generally best located where there is convenient access to limestone and other raw materials, reliable power and fuel, transport links and markets for finished cement. Because raw materials are bulky and heavy, transportation costs are an important consideration.
Exam Practice
Q1. Why is cement important for economic development? (2 marks)
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Q2. Where would it be economically viable to set up cement manufacturing units? (3 marks)
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12. Automobile and Information Technology Industries
Automobile industry
Automobiles provide transport for goods, services and passengers. The textbook lists trucks, buses, cars, motorcycles, scooters, three-wheelers and multi-utility vehicles among the products manufactured in India.
After liberalisation, new and contemporary models stimulated demand and supported the growth of the automobile industry.
Important centres mentioned in the textbook
Delhi, Gurugram, Mumbai, Pune, Chennai, Kolkata, Lucknow, Indore, Hyderabad, Jamshedpur and Bengaluru.
Information technology and electronics industry
The electronics industry covers a wide range of products, from transistor sets, televisions and telephones to cellular telecommunications equipment, telephone exchanges, radars, computers and equipment required by the telecommunications industry.
The textbook identifies Bengaluru as having emerged as the electronic capital of India and lists Mumbai, Delhi, Hyderabad, Pune, Chennai, Kolkata, Lucknow and Coimbatore as other important centres for electronic goods.
Software technology parks
The textbook includes a map of selected software technology parks on printed page 67 (PDF page 10). Use this map for location-based revision and to practise identifying the cities shown.
Importance of the IT industry
- It supports employment generation.
- It contributes to software and hardware development.
- It supports telecommunications and many other economic activities.
- Its continued growth is important for India's modern service and technology sectors.
Exam Practice
NCERT MCQQ1. Which industry manufactures telephones and computers? (1 mark)
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Q2. Name four important automobile manufacturing centres mentioned in the chapter. (2 marks)
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Q3. What is the importance of the electronics and IT industries? (3 marks)
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13. Industrial Pollution and Environmental Degradation
Industries contribute to economic growth and development, but they can also cause pollution of land, water and air, as well as noise pollution. Industrial activities need to be managed so that economic development does not come at the cost of environmental quality and human health.
Four types of industrial pollution
Caused by harmful gases such as sulphur dioxide and carbon monoxide, as well as dust, smoke, sprays and mist.
Caused by untreated industrial effluents, chemicals, dyes, acids, salts and heavy metals discharged into water bodies.
Caused by dumping solid wastes and harmful chemicals that degrade soil and may contaminate groundwater.
Caused by industrial machinery, generators, factory equipment, construction activities and drills.
Air pollution
Air pollution occurs when harmful gases and particulate matter enter the atmosphere. The textbook mentions sulphur dioxide, carbon monoxide, dust and smoke from factories, refineries, brick kilns and smelting plants. Toxic gas leaks can have serious long-term effects.
Air pollution can harm human health, animals, plants, buildings and the atmosphere.
Water pollution
Water pollution results from organic and inorganic industrial wastes and effluents discharged into rivers and other water bodies.
The textbook identifies paper and pulp, chemical, textile and dyeing, petroleum refinery, tannery and electroplating industries among the sources of water pollution. Industrial discharges may contain dyes, detergents, acids, salts and heavy metals such as lead and mercury.
| Pollutant or waste | Possible effect |
|---|---|
| Untreated chemical effluents | Contaminate water and harm aquatic ecosystems. |
| Hot water from factories and thermal plants | Causes thermal pollution and may harm aquatic life. |
| Industrial solid waste and chemicals | Degrade land and can contaminate soil and groundwater. |
| Smoke and particulate matter | Reduce air quality and may cause health problems. |
| Excessive industrial noise | Can cause stress, irritation and hearing impairment. |
Land pollution
Dumping glass, harmful chemicals, industrial effluents, packaging, salts and garbage can make soil unproductive. Rainwater can carry pollutants into the ground and contaminate groundwater.
Noise pollution
Unwanted sound can cause irritation and stress. The textbook describes possible effects such as hearing impairment and increased heart rate and blood pressure. Industrial machinery and construction equipment can generate high levels of noise.
Exam Practice
NCERTQ1. How do industries pollute the environment? (5 marks)
Show answer
- Air pollution: Factories release harmful gases, smoke and particulate matter.
- Water pollution: Untreated industrial effluents containing chemicals, dyes, acids and heavy metals may enter rivers and ponds.
- Land pollution: Dumping industrial waste and chemicals degrades soil and can contaminate groundwater.
- Noise pollution: Machinery, generators and industrial equipment create excessive noise that may cause stress and hearing problems.
- Thermal pollution: Hot water discharged from factories and thermal plants can affect aquatic life.
Q2. How does thermal pollution affect aquatic life? (2 marks)
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Q3. What are the effects of noise pollution? (3 marks)
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14. Control of Environmental Degradation
Industrial pollution can be reduced through better technology, efficient use of resources, treatment of industrial waste and strict environmental management.
Measures to reduce water pollution
- Minimise water use in industrial processing.
- Reuse and recycle water in two or more successive stages.
- Harvest rainwater to meet water requirements.
- Treat hot water and industrial effluents before releasing them into rivers and ponds.
- Regulate excessive groundwater extraction where water resources are threatened.
Three phases of industrial effluent treatment
| Stage | Process |
|---|---|
| Primary treatment | Mechanical methods, including screening, grinding, flocculation and sedimentation. |
| Secondary treatment | Biological treatment processes. |
| Tertiary treatment | Further biological, chemical and physical processes, including wastewater recycling. |
Measures to reduce air pollution
- Install electrostatic precipitators, fabric filters, scrubbers and inertial separators to reduce particulate matter.
- Use cleaner fuels, such as oil or gas where appropriate, to reduce smoke.
- Maintain industrial equipment and improve energy efficiency.
- Follow pollution-control standards and monitor emissions.
Measures to reduce noise pollution
- Fit generators and machinery with silencers.
- Use noise-absorbing materials where suitable.
- Redesign machinery to improve energy efficiency and reduce noise.
- Use appropriate protective equipment for workers exposed to high noise levels.
NTPC and environmental management
The textbook includes a section on NTPC's approach to environmental protection. It describes measures such as efficient use of equipment, minimising waste and maximising ash utilisation, developing green belts, managing ash ponds, recycling ash water, managing liquid waste, and monitoring environmental performance.
Exam Practice
NCERTQ1. Discuss the steps to be taken to minimise environmental degradation by industry. (5 marks)
Show answer
- Water conservation: Minimise water use and reuse or recycle water during industrial processing.
- Wastewater treatment: Treat industrial effluents before discharging them into rivers and ponds.
- Air pollution control: Install electrostatic precipitators, fabric filters, scrubbers and other suitable pollution-control equipment.
- Noise control: Fit machinery and generators with silencers and use noise-absorbing materials.
- Better waste management: Reuse industrial by-products, manage solid waste and ash responsibly, and develop green belts.
Q2. What are the three stages of industrial effluent treatment? (3 marks)
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Q3. Suggest three ways to control industrial air pollution. (3 marks)
Show answer
- Install electrostatic precipitators, fabric filters or scrubbers to remove pollutants.
- Use cleaner fuels where appropriate to reduce smoke and harmful emissions.
- Maintain machinery and monitor emissions to ensure compliance with environmental standards.
Quick Revision Notes
Use this section for a quick review before your examination.
Important definitions
| Term | Meaning |
|---|---|
| Manufacturing | Producing goods in large quantities by processing raw materials into more valuable products. |
| Agro-based industry | An industry that uses agricultural products as raw materials. |
| Mineral-based industry | An industry that uses minerals and metals as raw materials. |
| Basic industry | An industry that supplies its products as raw materials to other industries. |
| Consumer industry | An industry that produces goods for direct use by consumers. |
| Public-sector industry | An industry owned and operated by government agencies. |
| Cooperative industry | An industry owned and operated by producers, suppliers or workers who pool resources and share profits or losses. |
| Industrial pollution | Pollution caused by industrial activities, including air, water, land and noise pollution. |
Industries and their raw materials
| Industry | Main raw material or requirement | Key fact |
|---|---|---|
| Cotton textiles | Raw cotton | First successful mill in Mumbai in 1854. |
| Jute textiles | Raw jute | First jute mill near Kolkata in 1855 at Rishra. |
| Sugar | Sugarcane | Seasonal industry; cane sucrose content declines during transport. |
| Iron and steel | Iron ore, coking coal and limestone | A basic and heavy industry. |
| Aluminium smelting | Bauxite and electricity | Regular electricity supply is essential. |
| Chemical | Different mineral, petroleum and chemical inputs | Includes organic and inorganic sectors. |
| Fertiliser | Nitrogen, phosphate and potash compounds | Important for agricultural productivity. |
| Cement | Limestone, silica and gypsum | Bulky raw materials and transport are important. |
| Automobile | Metals and manufactured components | Produces vehicles for goods and passenger transport. |
| Electronics and IT | Electronic components and technological inputs | Supports communications, technology and employment. |
Key dates and locations
First successful cotton textile mill in Mumbai.
First jute mill near Kolkata at Rishra.
First cement plant set up in Chennai.
Main concentration of jute mills described in the chapter.
Maximum concentration of iron and steel industries described in the chapter.
Described in the chapter as India's electronic capital.
Industrial pollution at a glance
Mind map
Common mistakes to avoid
- Manufacturing belongs to the secondary sector, not the primary sector.
- Do not confuse agro-based industries with mineral-based industries.
- Iron and steel is a basic industry because many other industries depend on its products.
- Jute mills are concentrated along the Hugli River in the textbook's explanation.
- Aluminium smelting requires reliable electricity and bauxite.
- Remember all four types of industrial pollution: air, water, land and noise.
- Do not mix up the three stages of effluent treatment: primary, secondary and tertiary.
Revision checklist
Tick each point when you can explain it without looking at the notes.
0 of 12 revision points completed. This checklist is not saved permanently.
NCERT Exercise Solutions
These are suggested answers based on the exercise questions in the supplied NCERT PDF, Contemporary India–II, Chapter 6. Use the same key terms as your textbook and adapt the length to the marks allotted.
Exercise 1: Multiple-choice questions
(i) Which one of the following industries uses bauxite as a raw material?
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(ii) Which one of the following industries manufactures telephones and computers?
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Exercise 2: Answer briefly in not more than 30 words
(i) What is manufacturing?
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(ii) What are basic industries? Give an example.
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Exercise 3: Answer in about 120 words
(i) How do industries pollute the environment?
Show answer
Industries cause four main types of pollution: air, water, land and noise pollution. Air pollution results from harmful gases, smoke and particulate matter released by factories, refineries and other industrial units. Water pollution occurs when untreated industrial effluents containing chemicals, dyes, acids, salts and heavy metals are discharged into rivers and ponds. Hot water from factories and thermal power plants can cause thermal pollution and harm aquatic life. Land pollution occurs when industrial waste, harmful chemicals, packaging and garbage are dumped on land, reducing soil quality and contaminating groundwater. Noise from machinery, generators and construction equipment can cause stress, irritation and hearing impairment. Industries should therefore treat waste, reduce emissions and follow environmental standards.
(ii) Discuss the steps to be taken to minimise environmental degradation by industry.
Show answer
Industrial environmental degradation can be reduced through better technology, pollution-control equipment and responsible resource use. Industries should minimise water consumption, reuse and recycle water, harvest rainwater and treat wastewater before discharging it into rivers and ponds. Effluents should undergo primary mechanical, secondary biological and tertiary treatment where required. Air pollution can be controlled by installing electrostatic precipitators, fabric filters, scrubbers and other suitable equipment. Cleaner fuels can reduce smoke and harmful emissions. Noise can be reduced by fitting silencers, maintaining machinery and using noise-absorbing materials. Industries should manage solid waste and industrial by-products responsibly, develop green belts, monitor pollution and comply with environmental standards. These steps help combine economic development with environmental protection.
NCERT Activity: One word for each clue
| Clue | Suggested answer |
|---|---|
| (i) Used to drive machinery (5 letters) | Power |
| (ii) People who work in a factory (6 letters) | Workers |
| (iii) Where the product is sold (6 letters) | Market |
| (iv) A person who sells goods (8 letters) | Retailer |
| (v) Thing produced (7 letters) | Product |
| (vi) To make or produce (11 letters) | Manufacture |
| (vii) Land, water and air degraded (9 letters) | Pollution |
The answers above follow the clues and letter counts in the supplied textbook. “Manufacture” has 11 letters, and “pollution” has 9 letters.
NCERT Project Work
Select one agro-based and one mineral-based industry in your area. How can you complete the project?
Show a project-writing guide
Example: Sugar factory (agro-based)
- Raw material: Sugarcane.
- Other inputs: Water, electricity, machinery, labour, packaging and transport.
- Environmental questions: How are wastewater and solid waste treated? Are emissions monitored?
Example: Cement factory (mineral-based)
- Raw materials: Limestone, silica and gypsum.
- Other inputs: Coal or other fuel, electricity, labour, machinery and transport.
- Environmental questions: Are dust-control systems installed? How are waste, emissions and water managed?
For your local project, visit or research actual industries, record their names and locations, and use verified information. Do not claim that a factory follows environmental norms without evidence.
NCERT Puzzle: Hidden words
| Clue | Suggested answer |
|---|---|
| 1. Textiles, sugar, vegetable oil and plantation industries deriving raw materials from agriculture are called… | Agro-based |
| 2. The basic raw material for the 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 and steel |
| 5. A public-sector steel plant located in Chhattisgarh. | Bhilai |
| 6. Railway diesel engines are manufactured in Uttar Pradesh at this place. | Varanasi |
Final Practice Test
Class: 10 | Subject: Geography | Chapter: Manufacturing Industries
Suggested time: 30 minutes | Total: 20 marks
- Attempt all questions.
- Write answers in complete sentences.
- Use key terms from the chapter.
- These are revision questions, not an official CBSE paper.
Section A – MCQs (4 × 1 = 4 marks)
1. Manufacturing is mainly part of which sector?
2. Which industry is called a basic industry?
3. Which fibre is known as the Golden Fibre?
4. Which of the following is a type of industrial pollution?
Section B – Short answers (4 × 2 = 8 marks)
5. What is manufacturing? (2 marks)
Show suggested answer
6. State two reasons for the importance of manufacturing. (2 marks)
Show suggested answer
7. Why are most jute mills concentrated along the Hugli River? (2 marks)
Show suggested answer
8. Name the four main types of industrial pollution. (2 marks)
Show suggested answer
Section C – Long answers (2 × 4 = 8 marks)
9. Explain four factors affecting the location of iron and steel industries. (4 marks)
Show suggested answer
- Availability of iron ore and other raw materials.
- Access to coking coal, limestone and manganese.
- Reliable power, water and labour.
- Efficient transport links and access to markets.
10. Explain four measures to reduce industrial pollution. (4 marks)
Show suggested answer
- Treat industrial effluents before releasing wastewater.
- Reuse and recycle water and minimise water consumption.
- Install suitable air-pollution-control equipment.
- Use silencers, manage solid waste responsibly and monitor environmental performance.
Frequently Asked Questions
1. What is manufacturing in Class 10 Geography?
Manufacturing is the production of goods in large quantities after processing raw materials into more valuable products. It belongs to the secondary sector.
2. Why is manufacturing called the backbone of economic development?
It creates employment, supports agriculture, expands trade, adds value to raw materials and supplies products used by other industries.
3. What is the difference between agro-based and mineral-based industries?
Agro-based industries use agricultural products as raw materials, such as sugar and cotton textiles. Mineral-based industries use minerals and metals, such as iron and steel, aluminium and cement.
4. Why is the iron and steel industry called a basic industry?
It supplies steel and related materials used by other industries to manufacture machinery, equipment, construction materials and consumer goods.
5. Why are jute mills concentrated along the Hugli River?
The region has access to jute-growing areas, water, transport, labour, and Kolkata's banking, insurance and port facilities.
6. What are the four types of industrial pollution?
Air pollution, water pollution, land pollution and noise pollution.
7. How can industrial water pollution be reduced?
Industries can minimise water use, reuse and recycle water, harvest rainwater, treat effluents and cool hot water before discharge.
8. What are the three stages of industrial effluent treatment?
Primary treatment uses mechanical methods, secondary treatment uses biological processes, and tertiary treatment uses further biological, chemical and physical processes.
9. How should I revise this chapter for an examination?
Learn the definitions, classifications, major industries and their location factors. Practise the textbook maps, NCERT exercise answers, pollution-control measures and the final practice test.
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