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Grade 10 → Geography → Mineral and Energy Sources → 5.9-Exercises
Solved Example: 5-9-01
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
(ii) Koderma, in Jharkhand is the leading producer of which one of the following minerals?
(a) bauxite
(b) mica
(c) iron ore
(d) copper
(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
(iv) Which one of the following minerals is contained in the Monazite sand?
(a) oil
(b) uranium
(c) thorium
(d) coal
Check Answer
Solution:
(i) Which one of the following minerals is formed by decomposition of rocks, leaving a residual mass of weathered material?
(b) bauxite
(ii) Koderma, in Jharkhand is the leading producer of which one of the following minerals?
(b) mica
(iii) Minerals are deposited and accumulated in the stratas of which of the following rocks?
(a) sedimentary rocks
(iv) Which one of the following minerals is contained in the Monazite sand?
(c) Thorium
Solved Example: 5-9-02
2. 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
(b) conventional and non-conventional sources of energy
(ii) What is a mineral?
(iii) How are minerals formed in igneous and metamorphic rocks?
(iv) Why do we need to conserve mineral resources ?
Check Answer
Solution:
(i)
(a) Ferrous minerals contain iron, while non-ferrous minerals do not. Ferrous examples include iron ore; non-ferrous include copper and aluminum.
(b) Conventional energy sources are traditional (coal, oil); non-conventional includes renewable sources (solar, wind).
(ii) A mineral is a naturally occurring, inorganic solid with a specific chemical composition and crystalline structure, found in the Earth's crust.
(iii) In igneous rocks, minerals form from cooling magma or lava. In metamorphic rocks, minerals arise from heat and pressure altering existing minerals.
(iv) Conserving mineral resources is essential to ensure sustainable use, protect ecosystems, reduce environmental degradation, and ensure availability for future generations.
Solved Example: 5-9-03
Answer the following questions in about 120 words.
(i) Describe the distribution of coal in India.
(ii) Why do you think that solar energy has a bright future in India?
Check Answer
Solution:
(i) Coal is predominantly found in eastern and central India, with major reserves located in Jharkhand, Chhattisgarh, Odisha, West Bengal, and Madhya Pradesh. The largest coal-producing regions include the Jharia and Bokaro coalfields in Jharkhand, and the Korba coalfield in Chhattisgarh. India has the fifth-largest coal reserves globally, primarily consisting of bituminous and sub-bituminous coal types. The distribution is uneven, with significant deposits in the eastern states and relatively less in the southern and western regions, making transportation crucial for energy supply across the country.
(ii) Solar energy has a bright future in India due to abundant sunlight, government support, and decreasing technology costs. India aims for 100 GW of solar power capacity by 2022, fostering job creation and energy security. Additionally, rural electrification through solar energy can enhance access and development, making it a sustainable solution for the country's energy needs.
