GeographyCBSE Class 12 · Mineral and Energy Resources

Nuclear Energy, Non-Conventional Energy Sources and Conservation of Mineral Resources (Class 12 Geography, India: People and Economy, Chapter 5)

Updated 17 October 2026 · Fact-checked

Non-conventional or renewable sources such as solar, wind, tidal, geothermal and bio-energy are inexhaustible, equitably distributed and environment-friendly. Nuclear energy uses uranium and thorium. Mineral conservation needs renewables, recycling of scrap, substitutes and reduced export of scarce minerals, so reserves last longer for future generations.

Understand Nuclear and Non-Conventional Energy Sources and Conservation of Minerals

Why this topic matters. After coal, petroleum and natural gas, the chapter turns to non-conventional energy and conservation. Questions ask the minerals of nuclear energy, power projects, states with solar or wind potential and the steps of conservation.

1. Why non-conventional sources.

Fossil fuels (coal, petroleum, natural gas) and nuclear energy use exhaustible raw materials.
NCERT says sustainable energy resources are the renewable sources: solar, wind, hydro, geothermal and biomass. They are more equitably distributed and environment-friendly, and give sustained, cheaper energy after the initial cost.

2. Nuclear energy.

Minerals: uranium and thorium.
Uranium occurs in the Dharwar rocks: along the Singbhum Copper belt, Udaipur, Alwar and Jhunjhunu (Rajasthan), Durg (Chhattisgarh), Bhandara (Maharashtra) and Kullu (Himachal Pradesh).
Thorium comes mainly from monazite and ilmenite in the beach sands of Kerala and Tamil Nadu. The world's richest monazite deposits are in Palakkad and Kollam (Kerala), near Vishakhapatnam (Andhra Pradesh) and in the Mahanadi delta (Odisha).
History: the Atomic Energy Commission (1948); real progress after the Atomic Energy Institute at Trombay (1954), renamed Bhabha Atomic Research Centre in 1967.
Power projects: Tarapur (Maharashtra), Rawatbhata near Kota (Rajasthan), Kalpakkam (Tamil Nadu), Narora (Uttar Pradesh), Kaiga (Karnataka), Kakarapara (Gujarat).

3. Solar energy.

Sun rays tapped in photovoltaic cells; two effective processes are photovoltaics and solar thermal technology.
Solar thermal is cost competitive, environment friendly and easy to construct; NCERT says it is 7 per cent more effective than coal or oil based plants and 10 per cent more than nuclear plants.
Used in heaters, crop dryers and cookers. Western India (Gujarat and Rajasthan) has greater potential.

4. Wind energy.

Pollution free and inexhaustible; the kinetic energy of wind turns turbines into electricity.
Permanent winds (trade winds, westerlies), the monsoon, and local winds, land and sea breezes can be used.
Favourable conditions: Rajasthan, Gujarat, Maharashtra and Karnataka.

5. Tidal and wave energy. Ocean currents and tides store infinite energy. Large tidal waves occur along India's west coast, giving great potential, but so far this has not been utilised.

6. Geothermal energy. Heat from magma reaching the surface, and hot water from geysers, can be converted to power. In India a plant is commissioned at Manikaran (Himachal Pradesh). NCERT adds that the first successful attempt to tap underground heat (1890) was in Boise, Idaho, USA, where a hot water pipe network still works.

7. Bio-energy. Energy from biological products: agricultural residues, municipal, industrial and other wastes. It can become electricity, heat or cooking gas; it processes waste, improves rural economic life, reduces pollution and pressure on fuel wood, and raises self-reliance. Example: the Okhla municipal waste-to-energy project in Delhi.

8. Conservation of mineral resources.

Sustainable development must combine economic growth with environmental concern; traditional resource use creates enormous waste.
Develop inexhaustible alternatives (solar, wind, wave, geothermal) to replace exhaustible resources.
Recycle scrap metals, especially copper, lead and zinc, in which India's reserves are meagre.
Use substitutes for scarce metals.
Reduce export of strategic and scarce minerals so reserves last longer.

Graph checklist. A map outline marking the six nuclear power stations, and a table of renewable source, how it works and best states.

Key quotations

Short lines worth knowing by heart: who says them, when, and why they matter.

Wind energy is absolutely pollution free, inexhaustible source of energy.
NCERT, India: People and Economy, Chapter 5: Opening of the wind energy section.
A key phrase for 3-mark answers on renewable energy.

Nuclear and Non-Conventional Energy Sources and Conservation of Minerals: key facts

Nuclear minerals and history: Uranium
Thorium
Atomic Energy Commission 1948
Trombay 1954
Bhabha Atomic Research Centre 1967; Thorium from monazite and ilmenite in Kerala and Tamil Nadu beach sands.
Nuclear power projects: $T a r a p u r ∣ R a w a t bha t a ∣ K a l p ak k am ∣ N a r or a ∣ K ai g a ∣ K ak a r a p a r a$; States: Maharashtra, Rajasthan, Tamil Nadu, Uttar Pradesh, Karnataka, Gujarat.
Renewable sources and best regions: Solar Gujarat, Rajasthan
Wind Rajasthan, Gujarat, Maharashtra, Karnataka
Tidal west coast
Geothermal Manikaran; Bio-energy example: Okhla, Delhi.
Conservation steps: Develop renewables
Recycle scrap
Use substitutes
Reduce export of scarce minerals; Scrap is vital for copper, lead and zinc.

Solar	Gujarat, Rajasthan
Wind	Rajasthan, Gujarat, Maharashtra, Karnataka
Tidal	west coast
Geothermal	Manikaran

How to answer Nuclear and Non-Conventional Energy Sources and Conservation of Minerals questions

List-type answers need source, how it works, place, and one limitation or benefit. Keep names exact.

1Open with why non-conventional sources are called sustainable.
2For nuclear energy give the two minerals, their locations and the power projects.
3For each renewable source give the working principle and the best states.
4Mention that tidal energy is unutilised and that Manikaran is the geothermal plant.
5Close with the four steps of mineral conservation.

Nuclear and Non-Conventional Energy Sources and Conservation of Minerals in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Wind and farm pumps

Suppose a coastal village with steady breezes installs a small turbine near its fields to run water pumps without diesel.

Which NCERT energy source is used and why is it preferred?

Try it first, then show the solutionSolution

The kinetic energy of wind is converted into electrical energy through turbines.
NCERT calls wind energy pollution free and inexhaustible.

Answer: Wind energy, because it is pollution free and inexhaustible.

Memory hook: Breeze in, current out.

Recycling copper wire

Suppose a town collects old copper wire and sends it back to a foundry, so that fewer new ore loads are needed.

Which conservation measure is this, and why is it important for copper?

Try it first, then show the solutionSolution

Using scrap metals enables recycling of metals.
Use of scrap is especially significant for copper, lead and zinc, where India's reserves are meagre.

Answer: It is recycling of scrap, vital for copper as India's reserves are meagre.

Memory hook: Scrap today, ore tomorrow.

Tricks to remember Nuclear and Non-Conventional Energy Sources and Conservation of Minerals

Short memory aids. Say each one aloud once, then use it on a question the same day.

U and T
Uranium in Dharwar rocks, Thorium in beach sands.
Use it when: Minerals of nuclear energy.
T-R-K-N-K-K
Tarapur, Rawatbhata, Kalpakkam, Narora, Kaiga, Kakarapara.
Use it when: Nuclear power stations.
48-54-67
AEC 1948, Trombay 1954, BARC 1967.
Use it when: Dates of nuclear institutions.
R-R-S-S
Renewables, Recycle, Substitute, Save exports.
Use it when: Conservation measures.

Nuclear and Non-Conventional Energy Sources and Conservation of Minerals: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Minerals of nuclear energy · 1 mark · MCQBoard level

Which two minerals are important for the generation of nuclear energy in India?
(A) Iron ore and manganese
(B) Uranium and thorium
(C) Bauxite and mica
(D) Copper and lead

Try it first, then show the solutionSolution

NCERT names uranium and thorium as the important minerals (1 mark).

Answer: (B) Uranium and thorium

Example 2: Match sources with regions · 1 mark · MCQHarder board level

Match: (a) Geothermal plant, (b) Waste-to-energy project, (c) Uranium in Dharwar rocks, (d) Largest solar potential with (i) Okhla, (ii) Manikaran, (iii) Singbhum Copper belt, (iv) Gujarat and Rajasthan. Which is correct?
(A) (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
(B) (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
(C) (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
(D) (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

Try it first, then show the solutionSolution

Manikaran has a geothermal plant; Okhla is the waste-to-energy project.
Uranium occurs along the Singbhum Copper belt, and solar potential is greater in western India: Gujarat and Rajasthan (1 mark).

Answer: (A) (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

Example 3: Assertion and reason on tidal energy · 1 mark · Assertion-reasonHarder board level

Assertion (A): India has great potential for tidal energy along the west coast.
Reason (R): Large tidal waves occur along the west coast of India.
(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 of (A).
(C) (A) is true but (R) is false.
(D) (A) is false but (R) is true.

Try it first, then show the solutionSolution

NCERT states both: large tidal waves occur on the west coast and so potential is great, though not yet utilised.
R explains A (1 mark).

Answer: (A) Both (A) and (R) are true and (R) is the correct explanation of (A).

Example 4: Source-based: thorium and monazite · 3 marks · Source-basedHarder board level

Read the passage: "Thorium is mainly obtained from monazite and ilmenite in the beach sands along the coast of Kerala and Tamil Nadu. World's richest monazite deposits occur in Palakkad and Kollam districts of Kerala, near Vishakhapatnam in Andhra Pradesh and Mahanadi river delta in Odisha. Atomic Energy Commission was established in 1948; progress could be made only after the establishment of the Atomic Energy Institute at Trombay in 1954, which was renamed as the Bhabha Atomic Research Centre in 1967."
(i) From which minerals is thorium mainly obtained? (1)
(A) Bauxite and mica (B) Monazite and ilmenite (C) Coal and lignite (D) Haematite and magnetite
(ii) In which year was the Atomic Energy Institute at Trombay established? (1)
(A) 1948 (B) 1954 (C) 1967 (D) 1975
(iii) Which river delta is named for rich monazite deposits? (1)
(A) Ganga (B) Krishna (C) Mahanadi (D) Kaveri

Try it first, then show the solutionSolution

(i) Monazite and ilmenite, so (B) (1 mark).
(ii) 1954, so (B) (1 mark).
(iii) Mahanadi, so (C) (1 mark).

Answer: (i) B; (ii) B; (iii) C

Example 5: Bio-energy benefits · 3 marks · Short answerBoard level

What is bio-energy, and how does it help rural areas and the environment? (3 marks)

Try it first, then show the solutionSolution

Bio-energy is energy derived from biological products such as agricultural residues and municipal, industrial and other wastes (1 mark).
It can become electrical energy, heat energy or cooking gas and processes waste (1 mark).
It improves rural economic life, reduces pollution and pressure on fuel wood and enhances self-reliance (1 mark).

Answer: Bio-energy is energy derived from biological products, including agricultural residues and municipal, industrial and other wastes. It can be converted into electrical energy, heat energy or gas for cooking, and it processes waste and garbage while producing energy. It improves the economic life of rural areas, reduces environmental pollution and pressure on fuel wood, and enhances self-reliance; the Okhla project in Delhi converts municipal waste into energy.

Example 6: HOTS: Why renewables for sustainable development · 5 marks · Long answerHOTS / competency

Explain why NCERT calls non-conventional sources sustainable, and evaluate solar, wind and tidal energy for India with regions and limits. (5 marks)

Try it first, then show the solutionSolution

Fossil fuels and nuclear energy use exhaustible raw materials; renewables are equitably distributed, environment-friendly and cheaper after initial cost (1 mark).
Solar: photovoltaic and solar thermal; potential in Gujarat and Rajasthan (1 mark).
Wind: turbines convert kinetic energy; Rajasthan, Gujarat, Maharashtra, Karnataka (1 mark).
Tidal: west coast has large tidal waves, but not yet utilised (1 mark).
Conclusion: they are inexhaustible and can replace exhaustible resources (1 mark).

Answer: Fossil fuels such as coal, petroleum and natural gas, and nuclear energy, depend on exhaustible raw materials. Renewable sources such as solar, wind, hydro, geothermal and biomass are more equitably distributed and environment-friendly, and give sustained, cheaper energy once the initial cost is met.

Solar energy, tapped by photovoltaic cells and solar thermal technology, has greater potential in western India, in Gujarat and Rajasthan. Wind energy converts the kinetic energy of wind into electricity through turbines and has favourable conditions in Rajasthan, Gujarat, Maharashtra and Karnataka. Tidal energy has great potential along the west coast, where large tidal waves occur, but so far it has not been utilised.

Thus these sources can replace exhaustible resources, and their development supports sustainable development.

Where students lose marks in Nuclear and Non-Conventional Energy Sources and Conservation of Minerals

The slips examiners see most often, and what to write instead.

Mistake: Naming wrong minerals for nuclear energy
Students recall radium or plutonium.
Wrong working
Nuclear energy minerals: coal and radium.
Right working
Uranium and thorium.
Do this: Use the U-and-T memory line.
Usually costs: 1 mark.
Mistake: Placing Kaiga or Kalpakkam in wrong states
Six similar names.
Wrong working
Kalpakkam in Karnataka.
Right working
Kalpakkam in Tamil Nadu; Kaiga in Karnataka.
Do this: Learn the six as pairs of station and state.
Usually costs: 1 mark.
Mistake: Saying tidal energy is widely used
Assumes potential means use.
Wrong working
India generates large tidal power on the west coast.
Right working
Potential is great but has not yet been utilised.
Do this: Write 'potential, not yet utilised'.
Usually costs: 1 mark.

Exam tips

Always pair a power station with its state in a table.
For any renewable source write mechanism, region and one benefit in three short lines.
Conservation answers should have four points: renewables, recycling, substitutes, reduced export.
Keep monazite and ilmenite as the thorium minerals; examiners look for them.

Practice questions on Nuclear and Non-Conventional Energy Sources and Conservation of Minerals

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQBoard level
Which of the following is a nuclear power station in Rajasthan?
(A) Tarapur
(B) Kakarapara
(C) Rawatbhata
(D) Narora
Hint
Near Kota.
Answer
(C) Rawatbhata.
Q2 · 2 marks · Very short answerHarder board level
Name the state of each nuclear power project: (a) Kalpakkam, (b) Kaiga, (c) Narora, (d) Kakarapara. (2 marks)
Hint
Tamil Nadu, Karnataka, Uttar Pradesh, Gujarat.
Answer
(a) Tamil Nadu; (b) Karnataka; (c) Uttar Pradesh; (d) Gujarat.
Q3 · 1 mark · Assertion-reasonHarder board level
Assertion (A): Nuclear energy progress in India could be made only after 1954.
Reason (R): The Atomic Energy Commission was established in 1948.
(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 of (A).
(C) (A) is true but (R) is false.
(D) (A) is false but (R) is true.
Hint
Which event actually made progress possible?
Answer
(B) Both are true but R does not explain A: NCERT says progress came only after the Trombay institute (1954), not merely because the Commission existed in 1948.
Q4 · 3 marks · Short answerHarder board level
The Atomic Energy Commission was set up in 1948, the institute at Trombay in 1954 and it was renamed in 1967. Find the gaps between the three dates and name the 1967 institution. (3 marks)
Hint
1954 - 1948 and 1967 - 1954.
Answer
1954 - 1948 = 6 years; 1967 - 1954 = 13 years. The Atomic Energy Institute at Trombay was renamed the Bhabha Atomic Research Centre in 1967. NCERT says progress was made only after the Trombay institute (1954).
Q5 · 3 marks · Short answerBoard level
Write a short note on geothermal energy in India. (3 marks)
Hint
Magma, geysers, Manikaran.
Answer
Geothermal energy is obtained from the heat released when magma from the interior comes to the surface, and from hot water gushing through geyser wells. This heat can be converted into electrical energy. In India, a geothermal energy plant has been commissioned at Manikaran in Himachal Pradesh.
Q6 · 3 marks · Short answerHOTS / competency
Argue why India should reduce the export of strategic and scarce minerals even though export earns income, using NCERT's conservation reasoning. (3 marks)
Hint
Longer life of reserves, future generations.
Answer
Minerals are exhaustible, and sustainable development requires protecting resources for future generations. Reducing the export of strategic and scarce minerals allows existing reserves to be used for a longer period. This is especially important for metals such as copper, lead and zinc in which India's reserves are meagre, and it should be combined with recycling and substitutes.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.Where is the geothermal plant commissioned in India?Show answer
Manikaran in Himachal Pradesh.
2.Which waste-to-energy project does NCERT cite?Show answer
Okhla in Delhi.
3.In which rocks do uranium deposits occur?Show answer
The Dharwar rocks.
4.By how much is solar thermal energy more effective than coal or oil based plants, per NCERT?Show answer
7 per cent.
5.Which metals have meagre reserves in India, making scrap useful?Show answer
Copper, lead and zinc.

Nuclear and Non-Conventional Energy Sources and Conservation of Minerals: frequently asked questions

Why is nuclear energy not a renewable source?

NCERT groups nuclear energy with fossil fuels as using exhaustible raw materials.

Which states have favourable conditions for wind energy?

Rajasthan, Gujarat, Maharashtra and Karnataka.

Where can thorium be found?

In monazite and ilmenite in beach sands of Kerala and Tamil Nadu.

Why conserve minerals?

Sustainable development needs protection of resources for the future generations; traditional use creates waste and environmental problems.