5. Mineral and Energy Resources Questions and Answers

Content Structure

  • 1. NCERT Solutions
    • 1. Multiple Choice Questions
    • 1B. Answer the following questions in about 30 words.
    • 1C. Answer the following questions in about 120 words.
  • 2. Extra Questions and Answers
    • 2A. Multiple Choice Questions (MCQs)
    • 2B. Very Short Type Questions and Answers
    • 2C. Short Answer-type Questions
    • 2D. Case/Source-based Questions and Answers
    • 2E. Long Questions and Answers

1. NCERT Solutions

1. Multiple Choice Questions

(i) Which one of the following minerals is formed by decomposition of rocks, leaving a residual mass of weathered material?
(a) coal
(b) bauxite
(c) gold
(d) zinc

Ans: (b) bauxite

(ii) Koderma, in Jharkhand is the leading producer of which one of the following minerals?
(a) bauxite
(b) mica
(c) iron ore
(d) copper

Ans: (b) mica

(iii) Minerals are deposited and accumulated in the stratas of which of the following rocks?
(a) sedimentary rocks
(b) metamorphic rocks
(c) igneous rocks
(d) none of the above

Ans: (a) sedimentary rocks

(iv) Which one of the following minerals is contained in the Monazite sand?
(a) oil
(b) uranium
(c) thorium
(d) coal

Ans: (c) thorium

1B. Answer the following questions in about 30 words.

(i) Distinguish between the following in not more than 30 words.

(a) Ferrous and non-ferrous minerals

Ferrous MineralsNon-ferrous Minerals
Ferrous minerals are minerals that contain iron.Non-ferrous minerals are minerals that do not contain iron.
They are the basic raw materials for the iron and steel industry.They are mainly used in electrical, transport, engineering, and manufacturing industries.
These minerals are strong and are widely used for making machines, tools, and construction materials.These minerals are valued for their light weight, resistance to corrosion, and good conductivity.
Examples of ferrous minerals are iron ore, manganese, and chromite.Examples of non-ferrous minerals are copper, bauxite, lead, and zinc.

(b) Conventional and non-conventional sources of energy

Conventional Sources of EnergyNon-conventional Sources of Energy
Conventional sources of energy are traditional sources that have been used for many years.Non-conventional sources of energy are modern and renewable sources of energy.
Most conventional sources are exhaustible and may get depleted with continuous use.Most non-conventional sources are renewable and can be used repeatedly.
They cause more environmental pollution during their use.They are eco-friendly and produce very little pollution.
Examples of conventional sources are coal, petroleum, natural gas, and firewood.Examples of non-conventional sources are solar energy, wind energy, tidal energy, geothermal energy, and biogas.

(ii) What is a mineral?
Ans: A mineral is a naturally occurring substance with a definite chemical composition and a fixed internal structure. Minerals are found in different types of rocks and are formed through various geological processes. They are valuable natural resources and are used as raw materials in industries for making metals, machines, buildings, and many other products.

(iii) How are minerals formed in igneous and metamorphic rocks?
Ans: In igneous and metamorphic rocks, minerals are formed when mineral-rich molten material or gases move into cracks, crevices, faults, and joints. As these materials cool and solidify, they form mineral deposits called veins and lodes. Important minerals like tin, copper, zinc, and lead are commonly found in this way.

(iv) Why do we need to conserve mineral resources?
Ans: Mineral resources are limited and take millions of years to form. Rapid industrialisation and increasing consumption are reducing their reserves. Conserving minerals is necessary to ensure their availability for future generations, reduce wastage, encourage recycling, and promote sustainable development.

1C. Answer the following questions in about 120 words.

(i) Describe the distribution of coal in India.
Ans: Coal is the most important source of energy in India and is widely used for generating electricity and in many industries. Most coal deposits are found in the Gondwana rocks, which are about 200 million years old. These coalfields are mainly located in Jharkhand, Odisha, Chhattisgarh, West Bengal, Madhya Pradesh, Maharashtra, Telangana, and Andhra Pradesh. The important coalfields include Jharia, Raniganj, Bokaro, Korba, Talcher, and Singrauli. Tertiary coal is found in the northeastern states such as Assam, Meghalaya, Arunachal Pradesh, and Nagaland. India mainly produces bituminous coal, which is suitable for power generation and industrial use. Coal plays a vital role in the country’s energy needs and industrial development.

(ii) Why do you think that solar energy has a bright future in India?
Ans: Solar energy has a bright future in India because the country receives abundant sunlight for most of the year. India has favourable climatic conditions, especially in states like Rajasthan, Gujarat, and parts of South India, where solar radiation is high. Solar energy is renewable, non-polluting, and available in plenty. It helps reduce dependence on fossil fuels such as coal and petroleum, which are exhaustible and cause environmental pollution. Solar power can be used in homes, industries, agriculture, and remote villages where electricity supply is limited. With improving technology and government support, solar energy is becoming more affordable and efficient. Therefore, it is an important source of clean and sustainable energy for India’s future.

2. Extra Questions and Answers

2A. Multiple Choice Questions (MCQs)

1. Which of the following statements are correct about minerals?

  1. Minerals are naturally occurring substances.
  2. Minerals have a definite chemical composition.
  3. Minerals are created only by human activities.
  4. Minerals have an orderly internal structure.

Choose the correct answer.

A. 1, 2 and 4 only
B. 1 and 3 only
C. 2 and 3 only
D. 1, 2, 3 and 4

Ans: A. 1, 2 and 4 only

2. Which of the following statements about mineral occurrence are correct?

  1. Minerals are usually found in ores.
  2. Igneous and metamorphic rocks contain minerals in cracks and faults.
  3. Sedimentary rocks mainly contain minerals in beds or layers.
  4. All minerals are found only in sedimentary rocks.

A. 1, 2 and 3 only
B. 2 and 4 only
C. 1 and 4 only
D. All of the above

Ans: A. 1, 2 and 3 only

3. Which statements about mica are correct?

  1. Mica is a non-metallic mineral.
  2. It has excellent insulating properties.
  3. It is widely used in electrical and electronic industries.
  4. It is mainly used for making cement.

A. 1, 2 and 3 only
B. 2 and 4 only
C. 1 and 4 only
D. All statements are correct

Ans: A. 1, 2 and 3 only

4. Which of the following statements are correct about coal?

  1. Coal is the most abundantly available fossil fuel.
  2. It provides a substantial part of India’s energy needs.
  3. Anthracite is the highest quality coal.
  4. Coal is a renewable source of energy.

A. 1, 2 and 3 only
B. 2 and 4 only
C. 1 and 4 only
D. All statements are correct

Ans: A. 1, 2 and 3 only

5. Which of the following statements are correct about conservation of minerals?

  1. Minerals are exhaustible resources.
  2. Recycling helps conserve minerals.
  3. Improved technology reduces wastage.
  4. Minerals can be created naturally within a few years.

A. 1, 2 and 3 only
B. 2 and 4 only
C. 1 and 4 only
D. All statements are correct

Ans: A. 1, 2 and 3 only

6. Assertion (A): Iron ore is the basic mineral for the iron and steel industry.
Reason (R): Iron ore contains iron, which is the main raw material used for making steel.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation.
C. A is true, but R is false.
D. A is false, but R is true.

Ans: A. Both A and R are true, and R is the correct explanation of A.

7. Assertion (A): Coal is called a fossil fuel.
Reason (R): Coal is formed from the remains of plants buried over millions of years.
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation.
C. A is true, but R is false.
D. A is false, but R is true.

Ans: A. Both A and R are true, and R is the correct explanation of A.

8. Assertion (A): Copper is a ferrous mineral.
Reason (R): Copper does not contain iron.
A. Both A and R are true.
B. A is true, but R is false.
C. A is false, but R is true.
D. Both A and R are false.

Ans: C. A is false, but R is true.

Read the source carefully and answer the questions.

Minerals are an indispensable part of our lives. Almost everything we use, from a tiny pin to a towering building or a large ship, is made from minerals. Minerals occur in different types of geological formations such as igneous, metamorphic and sedimentary rocks. They are finite resources and should be used carefully.

9. Why should minerals be conserved?
A. They are unlimited resources.
B. They can be formed within a few years.
C. They are finite resources that take millions of years to form.
D. They can be manufactured easily.

Ans: C. They are finite resources that take millions of years to form.

10. Minerals are mainly found in
A. Rivers only
B. Geological rock formations
C. Atmosphere only
D. Oceans only

Ans: B. Geological rock formations

11. Which offshore petroleum field is one of India’s most important oil-producing areas?
A. Digboi
B. Ankleshwar
C. Mumbai High
D. Neyveli

Ans: C. Mumbai High

12. Which one of the following is a major lignite-producing centre in India?
A. Digboi (Assam)
B. Neyveli (Tamil Nadu)
C. Jharia (Jharkhand)
D. Bailadila (Chhattisgarh)

Ans: B. Neyveli (Tamil Nadu)

13. The Bailadila iron ore mines are located in
A. Odisha
B. Karnataka
C. Chhattisgarh
D. Goa

Ans: C. Chhattisgarh

14. Which one of the following is an important petroleum-producing area in Assam?
A. Digboi
B. Raniganj
C. Korba
D. Kudremukh

Ans: A. Digboi

15. Which one of the following is a non-ferrous mineral?
A. Iron ore
B. Manganese
C. Copper
D. Chromite

Ans: C. Copper

16. Which one of the following is the best method for conserving minerals?
A. Increasing wastage during mining
B. Using minerals without planning
C. Recycling and using improved technology
D. Extracting all minerals as quickly as possible

Ans: C. Recycling and using improved technology

2B. Very Short Type Questions and Answers

1. What is a mineral?
Ans: A mineral is a homogeneous, naturally occurring substance with a definite chemical composition and an internal structure. Minerals are found in different forms in nature, ranging from the hardest diamond to the softest talc, and are the basic components of rocks.

2. Which mineral is called “Brown Diamond”?
Ans: Lignite is known as the “Brown Diamond” because of its brown colour and economic importance. It is a low-grade coal mainly used as fuel in thermal power plants for generating electricity in different parts of India.

3. Name the oldest oil-producing state in India.
Ans: Assam is the oldest oil-producing state in India. Digboi, located in Assam, is famous for having one of Asia’s oldest continuously operating oil fields and has played an important role in India’s petroleum industry.

4. Why is solar energy becoming popular in India?
Ans: Solar energy is becoming popular because it is renewable, non-polluting, and abundantly available in India. It reduces dependence on fossil fuels, lowers electricity costs, conserves natural resources, and supports sustainable development and environmental protection

5. Why are minerals considered non-renewable resources?
Ans: Minerals are considered non-renewable resources because they take millions of years to form through natural geological processes. Once extracted and used, they cannot be replaced within a human lifetime, so they must be used carefully.

6. What are ferrous minerals?
Ans: Ferrous minerals are minerals that contain iron. They provide the basic raw material for the iron and steel industry. Iron ore, manganese, and chromite are important ferrous minerals found in different parts of India.

7. What are non-ferrous minerals?
Ans: Non-ferrous minerals are minerals that do not contain iron. Copper, bauxite, lead, zinc, and gold are common non-ferrous minerals. They are widely used in electrical equipment, transport, construction, and manufacturing industries.

8. What are metallic minerals?
Ans: Metallic minerals are minerals from which metals can be extracted. They are generally hard, shiny, and good conductors of heat and electricity. Iron ore, copper, manganese, and bauxite are important metallic minerals.

9. What are non-metallic minerals?
Ans: Non-metallic minerals do not contain metals and are mainly used as raw materials in industries. Limestone, mica, gypsum, and dolomite are common non-metallic minerals used in cement, fertilizer, and construction industries.

10. Why is mica called the most indispensable mineral in the electrical industry?
Ans: Mica is called the most indispensable mineral because it has excellent insulating properties and can withstand high temperatures. It is widely used in electrical and electronic equipment, including capacitors, radios, and electric appliances.

11. Which state is the leading producer of mica in India?
Ans: Jharkhand is one of the leading producers of mica in India. Other important mica-producing states are Andhra Pradesh and Rajasthan. India has long been known for producing high-quality mica for domestic use and export.

12. Why is petroleum called “Black Gold”?
Ans: Petroleum is called “Black Gold” because of its black colour and great economic value. It is an important source of energy and is used to produce petrol, diesel, kerosene, lubricants, plastics, and many petrochemical products.

13. What is nuclear energy?
Ans: Nuclear energy is produced by splitting atoms of radioactive elements such as uranium and thorium. It is used to generate electricity and is considered an important source of energy because it produces a large amount of power.

14. Why is energy considered the basis of economic development?
Ans: Energy is considered the basis of economic development because it is needed for industries, agriculture, transport, communication, and domestic activities. A steady supply of energy supports production, employment, and overall national growth.

2C. Short Answer-type Questions

1. Why are minerals important for economic development?
Ans: Minerals are the backbone of economic development because they provide essential raw materials for industries. They are used in manufacturing machinery, transport equipment, construction materials, electrical goods, and modern technology. The industrial growth and economic progress of a country depend largely on the availability and proper use of mineral resources.

2. Explain the mode of occurrence of minerals in igneous and metamorphic rocks.
Ans: In igneous and metamorphic rocks, minerals occur in cracks, crevices, faults, and joints. They are found as veins and lodes, formed when mineral-rich molten material or gases rise through cracks, cool down, and solidify beneath the Earth’s surface over a long period.

3. How are minerals found in sedimentary rocks?
Ans: Minerals in sedimentary rocks occur in horizontal layers or beds formed by the accumulation and deposition of sediments over millions of years. Some minerals, such as gypsum, potash, and rock salt, are also formed through evaporation, while others occur as nodules in sedimentary rocks.

4. Why is solar energy considered a future source of energy?
Ans: Solar energy is considered a future source because it is renewable, pollution-free, and abundantly available in India. It reduces dependence on fossil fuels, lowers greenhouse gas emissions, and can be used in remote areas where electricity supply is limited.

5. State any three advantages of wind energy.
Ans: Wind energy is renewable, non-polluting, and does not require fuel for electricity generation. It reduces dependence on fossil fuels, lowers greenhouse gas emissions, and is especially useful in coastal regions and areas with strong and steady winds.

6. Why is India rich in mineral resources?
Ans: India has diverse geological formations created over millions of years. These different rock formations contain a wide variety of metallic, non-metallic, and energy minerals. As a result, India has rich deposits of minerals distributed across different regions of the country.

7. Why is iron ore called the basic mineral of industrial development?
Ans: Iron ore is called the basic mineral of industrial development because it is the chief raw material for manufacturing steel. Steel is essential for making machinery, railway tracks, automobiles, bridges, buildings, ships, and industrial equipment. Therefore, the growth of industries and infrastructure depends largely on the availability of iron ore.

8. Describe the distribution of iron ore in India.
Ans: India has abundant reserves of iron ore. The major iron ore-producing states are Odisha, Chhattisgarh, Karnataka, Jharkhand, Goa, and Maharashtra. Odisha has the largest reserves, while high-grade hematite ore is mainly found in Odisha, Jharkhand, and Chhattisgarh. These deposits support the growth of India’s iron and steel industry.

9. Explain the importance of manganese in the iron and steel industry.
Ans: Manganese is an important mineral used in the manufacture of steel because it removes impurities such as sulphur and improves the hardness, strength, and durability of steel. It is also used in making bleaching powder, insecticides, dry-cell batteries, paints, chemicals, and glass, making it valuable for many industries.

10. Why is copper an important mineral?
Ans: Copper is an important non-ferrous mineral because it is an excellent conductor of electricity and heat. It is widely used in electrical wiring, electronic equipment, communication systems, power generation, and machine manufacturing. Copper is also used in making alloys such as brass and bronze for various industrial purposes.

2D. Case/Source-based Questions and Answers

1. Read the following passage carefully and answer the questions.

Mica is a non-metallic mineral known for its excellent insulating properties. It can withstand high temperatures and does not conduct electricity easily. Because of these qualities, mica is widely used in electrical and electronic industries. India has been one of the leading producers of mica in the world. The major mica-producing states are Jharkhand, Andhra Pradesh, Telangana, and Rajasthan.

(a) Why is mica considered an important mineral?
Ans: Mica is considered an important mineral because it has excellent insulating properties. It can resist high temperatures, does not conduct electricity, and is highly durable. These qualities make it suitable for use in electrical equipment, electronic devices, and communication industries. Its unique properties have made mica an essential mineral for modern industries.

(b) Name any two major mica-producing states in India.
Ans: Two major mica-producing states in India are Jharkhand and Andhra Pradesh. Other important mica-producing states include Telangana and Rajasthan. These states have rich deposits of high-quality mica, which is used in both domestic industries and exports.

(c) Mention two important uses of mica.
Ans: Mica is widely used in the manufacture of electrical equipment because it is a good insulator and can withstand high temperatures. It is also used in electronic appliances, capacitors, telecommunication equipment, paints, cosmetics, and decorative products due to its shining appearance and heat-resistant properties.

(d) Why is mica called a good insulator?
Ans: Mica is called a good insulator because it does not allow electricity to pass through easily and remains stable even at very high temperatures. These qualities make it safe for use in electrical wires, generators, transformers, and electronic devices where protection from electric current is necessary.

2. Read the following passage carefully and answer the questions.

Bauxite is the chief ore from which aluminium is extracted. It is formed due to the decomposition of rocks under suitable climatic conditions. Aluminium obtained from bauxite is light in weight, strong, corrosion-resistant, and easy to recycle. Odisha is the largest producer of bauxite in India, followed by Gujarat, Jharkhand, Maharashtra, and Chhattisgarh.

(a) Why is bauxite an important mineral?
Ans: Bauxite is an important mineral because it is the main source of aluminium, one of the most widely used metals in the world. Aluminium is lightweight, strong, resistant to corrosion, and easy to recycle. These qualities make it highly useful in transport, construction, electrical industries, and packaging materials.

(b) Which state is the largest producer of bauxite in India?
Ans: Odisha is the largest producer of bauxite in India. The state has rich deposits of high-grade bauxite that support aluminium industries. Other important producing states include Gujarat, Jharkhand, Maharashtra, and Chhattisgarh.

(c) Mention any two uses of aluminium.
Ans: Aluminium is widely used in the manufacture of aircraft, railway coaches, automobiles, and electrical wires because it is lightweight and strong. It is also used in making kitchen utensils, beverage cans, packaging materials, and construction work due to its corrosion-resistant nature.

(d) Why is aluminium preferred over many other metals?
Ans: Aluminium is preferred because it is light in weight, durable, resistant to rust, and can be recycled easily. It is also a good conductor of electricity and heat. These qualities make it suitable for transport, construction, electrical industries, and many everyday household products.

3. Read the following passage carefully and answer the questions.

Limestone is a sedimentary rock mainly composed of calcium carbonate. It is an important raw material for the cement industry and is also used in iron and steel manufacturing. Large deposits of limestone are found in Rajasthan, Madhya Pradesh, Andhra Pradesh, Gujarat, and Chhattisgarh. The availability of limestone plays an important role in industrial development.

(a) Why is limestone considered an important mineral?
Ans: Limestone is considered an important mineral because it is the basic raw material used in the manufacture of cement. It is also required in iron and steel industries, chemical industries, and construction work. The availability of limestone supports infrastructure development and industrial growth.

(b) Name any two limestone-producing states of India.
Ans: Two major limestone-producing states are Rajasthan and Madhya Pradesh. Other important producing states include Andhra Pradesh, Gujarat, and Chhattisgarh. These states supply limestone to cement factories and other industries across the country.

(c) Mention two important uses of limestone.
Ans: Limestone is mainly used in the manufacture of cement, which is essential for constructing buildings, roads, bridges, and dams. It is also used in iron and steel industries as a flux to remove impurities during the production process.

(d) How does limestone support industrial development?
Ans: Limestone supports industrial development by supplying the raw material needed for cement production and steel manufacturing. These industries provide employment, improve infrastructure, and contribute significantly to the country’s economic growth and industrial expansion.

4. Read the following passage carefully and answer the questions.

Petroleum is one of the most valuable fossil fuels and is found deep beneath the Earth’s surface. It is refined to produce petrol, diesel, kerosene, LPG, lubricants, and several petrochemical products. Major petroleum-producing areas in India include Mumbai High, Digboi, Ankleshwar, and the Krishna-Godavari Basin. Petroleum is essential for transportation, industries, and electricity generation.

(a) Why is petroleum considered an important source of energy?
Ans: Petroleum is considered an important source of energy because it provides fuel for transport, industries, agriculture, and power generation. It is also the basic raw material for petrochemical industries that manufacture plastics, synthetic fibres, fertilizers, medicines, and many other products used in daily life.

(b) Name any two petroleum-producing regions in India.
Ans: Two important petroleum-producing regions in India are Mumbai High and Digboi in Assam. Other major producing areas include Ankleshwar in Gujarat and the Krishna-Godavari Basin along the eastern coast of India.

(c) Mention any two products obtained from petroleum.
Ans: Two important products obtained from petroleum are petrol and diesel, which are widely used as fuels for vehicles and machinery. Other products include kerosene, LPG, lubricating oil, paraffin wax, bitumen, and several petrochemical products.

(d) Why is petroleum called ‘Black Gold’?
Ans: Petroleum is called ‘Black Gold’ because of its black colour and its great economic value. It is one of the most important sources of energy and provides raw materials for many industries. Its wide range of uses makes it as valuable as gold for modern economies.

5. Read the following passage carefully and answer the questions.

Natural gas is one of the cleanest fossil fuels available today. It is widely used in households, industries, transport, and power generation. The Krishna-Godavari Basin, Mumbai High, Tripura, and Assam are major natural gas-producing regions in India. The development of CNG and PNG has helped reduce air pollution in many Indian cities.

(a) Why is natural gas known as a clean fuel?
Ans: Natural gas is known as a clean fuel because it burns completely and releases much fewer harmful gases and smoke than coal and petroleum. It produces lower carbon emissions, reduces air pollution, and causes less environmental damage. Therefore, it is considered an environmentally friendly source of energy.

(b) Name any two natural gas-producing regions in India.
Ans: Two important natural gas-producing regions in India are the Krishna-Godavari Basin and Mumbai High. Other important producing areas include Tripura and Assam, which contribute significantly to the country’s natural gas production.

(c) What are CNG and PNG?
Ans: CNG (Compressed Natural Gas) is mainly used as a fuel for vehicles because it is cleaner and more economical than petrol or diesel. PNG (Piped Natural Gas) is supplied directly to homes and industries for cooking and heating through underground pipelines.

(d) State two advantages of using natural gas.
Ans: Natural gas produces very little air pollution and emits fewer greenhouse gases compared to coal and petroleum. It is highly efficient, easy to transport through pipelines, and provides a reliable source of energy for households, industries, transport, and electricity generation.

2E. Long Questions and Answers

1. Describe the distribution of iron ore in India.
Ans: Iron ore is the basic raw material for the iron and steel industry and plays an important role in the industrial development of India. The two main types of iron ore found in India are magnetite and hematite. Among them, hematite is the most important because it contains a higher percentage of iron and is widely used in industries. Odisha has the largest reserves of high-grade iron ore, especially in the Badampahar mining region. Chhattisgarh is another major producer, where the Bailadila hills are famous for their excellent quality iron ore. Karnataka also has rich deposits in Ballari, Chitradurga, Chikkamagaluru, and Tumakuru districts. Goa is another important producer and exports high-grade iron ore through its ports. These deposits support India’s iron and steel industries.

2. Explain the importance of coal as a source of energy.
Ans: Coal is the most important conventional source of energy in India and is widely used in many sectors of the economy. It is the main fuel for generating electricity in thermal power plants and supplies power to homes, industries, and transport. Coal is also an essential raw material for the iron and steel industry and many other manufacturing industries. On the basis of carbon content, coal is classified into anthracite, bituminous, lignite, and peat. Among these, bituminous coal is the most commonly used because of its good heating value. Large coal reserves are found in Jharkhand, Odisha, Chhattisgarh, West Bengal, Madhya Pradesh, Telangana, and Maharashtra. Coal has played a major role in India’s industrialisation, economic growth, and energy security.

3. Describe the distribution of petroleum and natural gas in India.
Ans: Petroleum is one of the most important fossil fuels and is widely used for transport, industries, agriculture, and power generation. It is also the basic raw material for many petrochemical industries. The major petroleum-producing areas in India are Mumbai High, Gujarat, and Assam. New reserves have also been discovered in the Krishna-Godavari Basin, which has increased domestic production. Natural gas is generally found along with petroleum deposits and is considered a cleaner fuel because it produces less pollution than coal and petroleum. The main natural gas-producing regions are the Krishna-Godavari Basin, Mumbai High, Tripura, and Assam. Natural gas is supplied to homes as PNG (Piped Natural Gas) and used as CNG (Compressed Natural Gas) in vehicles. Both petroleum and natural gas are essential for India’s economic and industrial development.

4. Explain the importance and uses of non-conventional sources of energy.
Ans: Non-conventional sources of energy include solar, wind, tidal, geothermal, and biogas energy. These sources are renewable because they can be used again and again without getting exhausted. They are environment-friendly and produce very little pollution compared to fossil fuels such as coal and petroleum. India receives abundant sunlight throughout the year, making solar energy one of the most useful renewable resources. Wind energy is mainly produced in Tamil Nadu, Gujarat, Maharashtra, Karnataka, and Rajasthan. The increasing use of renewable energy helps reduce dependence on conventional fuels, lowers greenhouse gas emissions, and protects the environment. It also improves energy security, saves valuable fossil fuels, and supports sustainable development by meeting present energy needs without affecting future generations.

5. Why is conservation of minerals necessary? Explain the measures to conserve them.
Ans: Minerals are exhaustible resources that take millions of years to form through natural processes. Once they are used up, they cannot be replaced within a short period. Therefore, it is necessary to conserve minerals for future generations. Conservation helps reduce unnecessary wastage, protects the environment, and ensures the availability of valuable resources for continued industrial and economic development. Minerals can be conserved by using advanced and scientific mining methods, reducing losses during extraction and processing, and making better use of available resources. Recycling and reusing metals also help reduce the demand for fresh mineral extraction. The greater use of renewable sources of energy can reduce dependence on fossil fuels. Proper planning and careful use of mineral resources are essential for sustainable development.

6. Explain the importance and uses of petroleum in India.
Ans: Petroleum is one of the most important sources of energy in India and plays a vital role in the country’s economic development. It provides fuel for cars, buses, trucks, trains, aircraft, ships, and industries. It is also used for generating electricity in some areas where other energy sources are not available. Petroleum is refined in oil refineries to produce petrol, diesel, kerosene, LPG, lubricants, paraffin wax, and bitumen. It is the basic raw material for the petrochemical industry, which manufactures plastics, synthetic fibres, fertilizers, medicines, detergents, and many other useful products. Because petroleum has a wide range of uses and high economic value, it is often called “Black Gold.” It is an essential resource for transport, industries, and everyday life.

7. Explain why mineral and energy resources are important for the economic development of India.
Ans: Mineral and energy resources are the foundation of India’s industrial and economic development. Minerals provide the basic raw materials for industries such as iron and steel, aluminium, cement, chemicals, and engineering. Energy resources like coal, petroleum, natural gas, and electricity are needed to run factories, transport systems, agriculture, and households. These resources increase industrial production, create employment opportunities, improve transport and communication, and help in the development of infrastructure. They also promote trade, increase exports, and contribute to government revenue. Proper use of mineral and energy resources improves the standard of living of people and supports the country’s overall growth. Therefore, careful use and conservation of these valuable resources are essential for achieving sustainable economic development.

8. Describe the occurrence and distribution of bauxite in India.
Ans: Bauxite is the chief ore used for producing aluminium, which is a lightweight, strong, and corrosion-resistant metal. It is formed by the decomposition of rocks under suitable climatic conditions over a long period. Aluminium obtained from bauxite is widely used in aircraft manufacturing, electrical industries, transport, construction, packaging, and household goods because it is durable and easy to recycle. Odisha is the largest producer of bauxite in India and has rich reserves of high-quality ore. Other important bauxite-producing states are Gujarat, Jharkhand, Maharashtra, Chhattisgarh, Madhya Pradesh, and Tamil Nadu. Most bauxite deposits are found in plateau regions. The availability of bauxite supports the aluminium industry and contributes significantly to India’s industrial and economic development.

9. Explain the need for using renewable sources of energy in India.
Ans: India’s growing population, rapid industrialisation, and increasing use of modern technology have greatly increased the demand for energy. Conventional sources such as coal, petroleum, and natural gas are limited, exhaustible, and cause environmental pollution. Therefore, it is necessary to use renewable sources of energy such as solar, wind, biogas, tidal, and geothermal energy. These sources are clean, environment-friendly, and can be used repeatedly without getting exhausted. They help reduce greenhouse gas emissions, conserve fossil fuels, and improve energy security. India receives abundant sunlight and has good wind conditions in many regions, making renewable energy highly suitable. Promoting renewable energy supports sustainable development and ensures that future generations also have access to safe and reliable energy resources.

10. Explain the classification of minerals on the basis of their composition with suitable examples.
Ans: On the basis of composition, minerals are mainly classified into metallic minerals and non-metallic minerals. Metallic minerals contain metals and can be melted to obtain new products. They are further divided into ferrous minerals, which contain iron, such as iron ore, manganese, and chromite, and non-ferrous minerals, which do not contain iron, such as copper, bauxite, lead, and zinc. Non-metallic minerals do not contain metals and are mainly used as raw materials in different industries. Important examples include limestone, mica, gypsum, and dolomite. Metallic minerals are widely used in engineering and manufacturing industries, while non-metallic minerals are used in cement, construction, chemicals, electrical equipment, and glass industries, making them essential for industrial development.

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