Exam-useful questions from this chapter, grouped by marks, each with a full model answer. Try writing the answer yourself first, then check it against this one.
1 1-Mark Questions
Q. What is a mineral?
Answer: A mineral is a natural substance of organic or inorganic origin with definite chemical and physical properties.
Q. Name the two main categories into which minerals are grouped.
Answer: Metallic and non-metallic.
Q. What is a ferrous mineral?
Answer: A metallic mineral that contains iron content, such as iron ore itself.
Q. Name the two main types of iron ore found in India.
Answer: Haematite and magnetite.
Q. Which state is the largest producer of bauxite in India?
Answer: Odisha, led by Kalahandi and Sambalpur.
Q. In which year was the Oil and Natural Gas Commission (ONGC) set up?
Answer: 1956.
Q. Name the two minerals used for generating nuclear energy.
Answer: Uranium and thorium.
Q. What is Jharia known for, according to the chapter?
Answer: It is India’s largest coalfield, followed by Raniganj.
Q. Where has a geothermal energy plant been commissioned in India? Name the state.
Answer: Manikaran, in Himachal Pradesh.
Q. Name the two types of refineries in India named in the chapter.
Answer: Field-based (e.g. Digboi) and market-based (e.g. Barauni).
Q. Name the project mentioned in the chapter that converts municipal waste into energy, and the city it is in.
Answer: Okhla, in Delhi.
Q. What does CNG stand for, and what is it used as, according to the chapter?
Answer: Compressed Natural Gas, used as a transport fuel, distributed through city gas distribution networks.
Q. According to the chapter’s “Iron ore mining gets a boost” box, which two countries are named as world leaders in iron ore production and consumption?
Answer: Brazil and China.
2 2-Mark Questions
Q. Distinguish between a ferrous and a non-ferrous mineral, with one example of each named in the chapter.
Answer: A ferrous mineral contains iron content, for example iron ore itself. A non-ferrous mineral has no iron content, for example copper or bauxite.
Q. Why is petroleum called “liquid gold”? Name two of the petrochemical products the chapter lists.
Answer: It is called liquid gold because of its scarcity and diversified uses. Its by-products are processed into products such as fertiliser and synthetic rubber (also synthetic fibre, medicines, vaseline, lubricants, wax, soap and cosmetics).
Q. What is meant by the “inverse relationship between quality and quantity” characteristic of minerals?
Answer: It means that minerals of good quality are less in quantity, while minerals available in larger quantity tend to be of lower quality, one of the three characteristics common to all minerals, alongside uneven distribution and exhaustibility.
Q. Differentiate between Gondwana and tertiary coal deposits by their location, naming one region for each.
Answer: Gondwana coal is the older deposit, found mainly in the Damodar Valley (Jharkhand-Bengal coal belt), including fields like Jharia and Raniganj. Tertiary coal is younger and occurs in the north-eastern states such as Assam, Arunachal Pradesh, Meghalaya and Nagaland.
Q. What is bio-energy, and how does it help the economic life of rural areas, according to the chapter?
Answer: Bio-energy is energy derived from biological products such as agricultural residues and municipal, industrial and other wastes, converted into electrical energy, heat energy or cooking gas. It improves the economic life of rural areas in developing countries, reduces environmental pollution, enhances self-reliance and reduces pressure on fuel wood.
Q. Give the atomic-energy timeline: when was the Atomic Energy Commission established, and when was the Trombay institute renamed the Bhabha Atomic Research Centre?
Answer: The Atomic Energy Commission was established in 1948. The Atomic Energy Institute was set up at Trombay in 1954, and it was renamed the Bhabha Atomic Research Centre in 1967.
Q. According to the chapter’s box on India’s solar energy growth, what solar capacity does India’s energy future point towards by 2050 and by 2070, to meet its Net Zero target?
Answer: The box says India could be looking at 1500 GW of solar capacity by 2050, and studies even project a solar capacity of 5600 GW by 2070 to achieve India’s Net Zero target.
3 4-Mark Questions
Q. Explain why minerals are exhaustible resources, and what this means for their conservation.
Answer: Minerals take long geological periods to form and, once used, cannot be replenished quickly. Unlike a crop, they have no “second crop”, so they are exhaustible resources. Because of this, sustainable development requires balancing economic development with environmental concerns, since traditional methods of resource use generate enormous waste and other environmental problems. The chapter recommends developing inexhaustible alternatives such as solar, wind, wave and geothermal energy to replace exhaustible ones, recycling scrap metals (especially copper, lead and zinc, where India’s reserves are meagre), using substitutes for scarce metals to reduce their consumption, and reducing the export of strategic and scarce minerals so that existing reserves last longer.
Q. Describe the distribution of iron ore in India, naming the leading states and one important mine or belt in each of three states.
Answer: India has the largest reserve of iron ore in Asia, mainly as haematite and magnetite, with about 95 per cent of reserves lying in Odisha, Jharkhand, Chhattisgarh, Karnataka, Goa, Telangana, Andhra Pradesh and Tamil Nadu. In Odisha, the Sundergarh, Mayurbhanj and Jhar hill ranges hold mines such as Gurumahisani, Sulaipet, Badampahar, Kiruburu and Bonai. In Jharkhand, the Poorbi and Pashchimi Singhbhum districts hold the Noamundi and Gua mines. In Chhattisgarh, the Durg, Dantewara and Bailadila belt includes the important Dalli and Rajhara mines in Durg district. Karnataka’s Sandur-Hospet belt (Ballari district), the Baba Budan hills and Kudremukh (Chikkamagaluru) are also important, and Goa has emerged as a significant producer as well.
Q. Explain the difference between conventional and non-conventional sources of energy, as described in the chapter, with two examples of each.
Answer: Conventional sources of energy, coal, petroleum and natural gas (fossil fuels), along with nuclear energy minerals such as uranium and thorium, are exhaustible resources. Non-conventional (sustainable) energy resources are only the renewable sources, such as solar and wind energy (also hydro-geothermal and biomass), which are more equitably distributed and environment-friendly, and provide more sustained, eco-friendly, cheaper energy once the initial cost is met.
Q. Describe the distribution of manganese in India.
Answer: Manganese is an important raw material for smelting iron ore and manufacturing ferro-alloys, and is mainly associated with the Dharwar system of rocks. Madhya Pradesh and Odisha are the leading producers. In Odisha, manganese occurs in the central part of the iron-ore belt: Bonai, Kendujhar, Sundergarh, Gangpur, Koraput, Kalahandi and Bolangir. In Madhya Pradesh, it occurs in the Balaghat-Chhindwara-Nimar-Mandla-Jhabua belt. Karnataka (Dharwar, Ballari and neighbouring districts) is also a producer, as is Maharashtra (Nagpur, Bhandara, Ratnagiri), though its deposits are at a disadvantage being far from steel plants. Telangana, Goa and Jharkhand are minor producers.
Q. Give an account of the distribution of mica in India. (Exercise-based)
Answer: Mica is the most important non-metallic mineral produced in India, used chiefly in the electrical and electronic industries because it splits into thin, tough, flexible sheets. The Jharkhand belt, about 150 km long and 22 km wide in the lower Hazaribagh plateau, gives high quality mica. Andhra Pradesh’s Nellore district gives the best quality mica. Rajasthan has a belt about 320 km long, from Jaipur to Bhilwara and around Udaipur. Other producing areas include Telangana; Tamil Nadu (Coimbatore, Tiruchirapalli, Madurai, Kanniyakumari); West Bengal (Purulia, Bankura); Madhya Pradesh; Mysuru and Hasan in Karnataka; Alleppey in Kerala; and Ratnagiri in Maharashtra.
4 6-Mark Questions
Q. Write a detailed note on the petroleum resources of India. (Exercise-based)
Answer: Crude petroleum consists of hydrocarbons of liquid and gaseous states, varying in chemical composition, colour and specific gravity, and occurs in sedimentary rocks of the tertiary period. It is an essential source of energy for all internal combustion engines in automobiles, railways and aircraft, and its numerous by-products are processed in petrochemical industries into fertiliser, synthetic rubber, synthetic fibre, medicines, vaseline, lubricants, wax, soap and cosmetics. This is why petroleum is called “liquid gold”, for its scarcity and diversified uses. Oil exploration and production was taken up systematically only after the Oil and Natural Gas Commission (ONGC) was set up in 1956; till then, Digboi in Assam was the only oil-producing region. In Assam, Digboi, Naharkatiya and Moran are important oil-producing areas, while Gujarat’s leading oilfields are Ankaleshwar, Kalol, Mehsana, Nawagam, Kosamba and Lunej. Mumbai High, 160 km off Mumbai, was discovered in 1973 and production commenced in 1976, and new deposits have since been found in the Krishna-Godavari and Kaveri basins on the east coast. Crude oil contains impurities and must be refined before use: India has two types of refineries, field-based (such as Digboi, built close to the oilfield) and market-based (such as Barauni, built close to the market it serves).
Q. Describe India’s three mineral belts, naming the states and minerals of each.
Answer: The North-Eastern Plateau belt covers the Chhotanagpur plateau (Jharkhand), the Odisha plateau, West Bengal and parts of Chhattisgarh, and has the most varied mineral deposits, yielding iron ore, coal, manganese, bauxite and mica together. The South-Western Plateau belt covers Karnataka, Goa and the contiguous Tamil Nadu uplands and Kerala, and is rich in ferrous metals and bauxite, with high-grade iron ore, manganese and limestone; it lacks coal except for the Neyveli lignite deposit, while Kerala additionally has monazite, thorium and bauxite clay, and Goa is an important iron ore producer. The North-Western belt lies along the Aravalis in Rajasthan and part of Gujarat, associated with Dharwar rocks, and yields copper and zinc; Rajasthan is additionally rich in building stones (sandstone, granite, marble), gypsum and Fuller’s earth, with dolomite and limestone for the cement industry, while Gujarat is known for petroleum, and both states are rich in salt. A fourth, less concentrated belt runs along the Himalayas, where copper, lead, zinc, cobalt and tungsten occur on both the eastern and western sides, and the Assam valley also holds mineral oil deposits.
Q. Discuss the various non-conventional sources of energy in India, and explain why they are considered more sustainable than conventional sources.
Answer: Conventional sources, coal, petroleum, natural gas and nuclear energy minerals, use exhaustible raw materials. The chapter treats nuclear energy in two places: its opening list of conventional sources includes “nuclear energy minerals”, yet nuclear energy is described under the heading “Non-Conventional Energy Sources”, the grouping the CBSE syllabus also follows; like fossil fuels it uses exhaustible raw materials. It uses uranium (from Dharwar rocks, the Singhbhum copper belt, and parts of Rajasthan, Chhattisgarh, Maharashtra and Himachal Pradesh) and thorium (from monazite and ilmenite in the beach sands of Kerala and Tamil Nadu), with power projects at Tarapur, Rawatbhata, Kalpakkam, Narora, Kaiga and Kakarapara. Non-conventional (sustainable) sources, by contrast, are renewable, more equitably distributed and environment-friendly, providing more sustained, eco-friendly, cheaper energy once the initial cost is met. The main non-conventional sources are as follows. Solar energy, tapped via photovoltaics and solar thermal technology, is 7 per cent more effective than coal or oil-based plants and 10 per cent more effective than nuclear plants, with Gujarat and Rajasthan holding the greatest potential. Wind energy, pollution-free and inexhaustible, is generated favourably in Rajasthan, Gujarat, Maharashtra and Karnataka using permanent, seasonal and even local winds. Tidal and wave energy have great potential along India’s west coast, though wave energy is not yet utilised. Geothermal energy taps heat released when magma reaches the surface, or hot water from geyser wells, with India’s plant at Manikaran, Himachal Pradesh. Bio-energy, derived from agricultural residues and municipal, industrial and other waste (as at Okhla, Delhi), can be converted into electricity, heat or cooking gas, improving rural economic life and reducing pressure on fuel wood.
5 Case Studies
(A) 1 mark What does sustainable development require, according to the passage?
Answer: Integration of the quest for economic development with environmental concerns.
(B) 1 mark Name any three alternative, inexhaustible energy sources listed in the passage.
Answer: Solar power, wind, wave and geothermal energy (any three of these).
(C) 2 marks According to the passage, why is the use of scrap especially significant for metals like copper, lead and zinc?
Answer: Because India’s reserves of these metals are meagre, so recycling scrap metal reduces the pressure on these already scarce reserves and cuts the need for fresh extraction.
(A) 1 mark What is bio-energy derived from, according to the passage?
Answer: Biological products, including agricultural residues and municipal, industrial and other wastes.
(B) 1 mark Name the project mentioned in the passage that converts municipal waste into energy, and the city it is in.
Answer: Okhla, in Delhi.
(C) 2 marks According to the passage, how does bio-energy improve the economic life of rural areas in developing countries?
Answer: By processing waste and garbage into usable energy (electrical energy, heat energy or cooking gas), which reduces environmental pollution, enhances self-reliance and reduces pressure on fuel wood.
6 Map Work
On the given outline map, locate and label the following with suitable symbols:
- Mayurbhanj (iron ore mine) 1 mark
- Bailadila (iron ore mine) 1 mark
- Ratnagiri (iron ore mine) 1 mark
- Ballari (Bellary) (iron ore mine) 1 mark
- Balaghat (manganese mine) 1 mark
- Shivamogga (Shimoga) (manganese mine) 1 mark
- Hazaribagh (copper mine) 1 mark
- Singhbhum (copper mine) 1 mark
- Khetri (Khetari) (copper mine) 1 mark
- Katni (bauxite mine) 1 mark
- Bilaspur (bauxite mine) 1 mark
- Koraput (bauxite mine) 1 mark
- Jharia (coal mine) 1 mark
- Bokaro (coal mine) 1 mark
- Raniganj (coal mine) 1 mark
- Neyveli (lignite coal mine) 1 mark
- Mathura (oil refinery) 1 mark
- Jamnagar (oil refinery) 1 mark
- Barauni (oil refinery) 1 mark
Answer hints:
- Mayurbhanj (iron ore mine): Odisha: Odisha iron-ore hill ranges (Sundergarh, Mayurbhanj, Jhar).
- Bailadila (iron ore mine): Chhattisgarh: Durg-Dantewara-Bailadila belt, far south of the state.
- Ratnagiri (iron ore mine): Maharashtra: Konkan coast district, south of Mumbai.
- Ballari (Bellary) (iron ore mine): Karnataka: Sandur-Hospet area of Ballari district, east Karnataka.
- Balaghat (manganese mine): Madhya Pradesh: Balaghat-Chhindwara-Nimar-Mandla-Jhabua belt, south-east MP.
- Shivamogga (Shimoga) (manganese mine): Karnataka: Western Karnataka, on the plateau east of the Western Ghats.
- Hazaribagh (copper mine): Jharkhand: Hazaribagh plateau, north Jharkhand.
- Singhbhum (copper mine): Jharkhand: South-east Jharkhand, the Singhbhum copper belt.
- Khetri (Khetari) (copper mine): Rajasthan: Jhunjhunu district, north-east Rajasthan (Aravali belt).
- Katni (bauxite mine): Madhya Pradesh: Katni-Jabalpur area, north-east MP.
- Bilaspur (bauxite mine): Chhattisgarh: North Chhattisgarh, near the Amarkantak plateau.
- Koraput (bauxite mine): Odisha: South Odisha (Eastern Ghats area).
- Jharia (coal mine): Jharkhand: Damodar valley; India’s largest coalfield.
- Bokaro (coal mine): Jharkhand: Damodar valley, west of Jharia.
- Raniganj (coal mine): West Bengal: Damodar valley, just east of the Jharkhand border.
- Neyveli (lignite coal mine): Tamil Nadu: South of Chennai, near the east coast; lignite.
- Mathura (oil refinery): Uttar Pradesh: South of Delhi, on the Yamuna.
- Jamnagar (oil refinery): Gujarat: Gulf of Kachchh coast, Saurashtra.
- Barauni (oil refinery): Bihar: On the Ganga, north Bihar; a market-based refinery.