Ch.5 Minerals And Energy Resources
Very Short Answer Questions
Q. Which is the largest bauxite producing State?
A. Odisha
Q. Which region of India contains maximum reserves of coal and metallic mineral?
A. The peninsular region contains maximum reserves of coal and metallic minerals.
Q. Which minerals are indispensable for electrical and electronic industries?
A. Mica, copper, iron ore.
Q. Where is Khetri Mine situated?
A. Rajasthan
A. (i) Limestone
(ii) Mica
(iii) Coal
(iv) Potash
(v) Sandstone
(vi) Marble
(vii) Granite
(viii) Petroleum
Short Answer Questions
Q. "India's future is very bright in Solar energy". Support the statement.
OR
"Solar energy is becoming popular in rural and remote areas." Justify.
A. Solar energy is becoming very popular in India especially in rural and remote areas because:
・India is a tropical country and thus sunlight is abundant here. Therefore India has enormous possibilities of tapping solar energy.
・Solar energy is renewable and causes much less pollution as compared to other sources of energy.
・It can be easily set up in rural and remote areas as it does not require a power station.
・Solar energy reduces the dependence on firewood and cattle dung cake for energy.
Eg. Dhirubhai Ambani Solar Park (Rajasthan), Mithapur Solar Power Plany (Gujarat), CIAL Solar Power Project (Kerala) etc.
Q. How is tidal energy produced? Explain.
A. ・Oceanic tides can be used to generate electricity. Floodgate dams are built along inlets.
・During high tide, water flows into the inlet and gets trapped when the gate is closed.
・After the tide falls outside the flood gate, the water retained by the floodgate flows back to the sea via a pipe that carries it through a power generating turbine. This is how tidal energy is produced.
Q. Which are the main minerals used to obtain nuclear energy. Name any two states where these minerals are found.
A. The minerals used to obtain nuclear energy are uranium and thorium.
These are available in:
・Jharkhand
・Aravalli ranges of Rajasthan
・Monazite sands of Kerala
Q. Distinguish between ferrous and non-ferrous minerals. Give two examples of each.
A. Ferrous minerals are the minerals which contain iron while non-ferrous minerals are the minerals which do not contain iron.
Examples of ferrous minerals: Iron ore and manganese.
Examples of non-ferrous minerals: Copper and lead.
Q. Describe the specific features of Bellary-Chitradurga-Chikmagalur-Tumakuru belt of iron ore.
A.・This belt is located in Karnataka and has large reserves of iron ore. The Kudremukh mines located in Western Ghats of Karnataka are a 100% export unit.
・Kudremukh deposits are known to be one of the largest in the world.
・The ore is transported as slurry through a pipeline to a port near Mangaluru.
Q. What are the major use of limestone? Mention any two states which are the major producers of limestone.
A. Limestone is the basic raw material for the cement industry and is also used for smelting iron ore in the blast furnace.
It is found mainly in:
・Karnataka
・Andhra Pradesh
Q. Give the essential features of Mica.
A.・Mica is a mineral made up of a series of plates or leaves.
・It splits easily into thin sheets. These sheets can be so thin that a thousand can be layered into a mica sheet of a few centimeters high.
・Mica can be clear, black, green, red yellow or brown.
・Due to its excellent di-electric strength, low power cost factor, insulating properties and resistance to high voltage, mica is one of the most indespensible minerals used in electric and electronic industries.
・In India, it is found in Koderma Gaya- Hazaribagh belt of Jharkhand, northern edge of Chota Nagpur Plateau, in Rajasthan around Ajmer, Nellore mica belt in Andhra Pradesh.
Q. Why has it become necessary to use renewable energy resources?
A. It has become necessary to use renewable energy resources because:
・The growing consumption of energy has resulted in the country becoming increasingly dependent on fossil fuels such as coal, oil and gas.
・Rising prices of oil and gas and their potential shortages have raised uncertainties about the security of energy supply in the future, which in turn has serious repercussions on the growth of national economy.
・Increasing use of fossil fuels also causes serious environmental problems.
Long-Answer Questions
Q. Explain the needs and methods of conservation of minerals.
OR
" India is one of the least energy efficient countries in the world. We have to adopt cautious approaches for the judicious use of our limited energy resources". Analyze the statement.
A. Needs to conserve resources:
・Energy is the basic requirement for economic development. Every sector of the national economy- agriculture, industry, transport, commercial and domestic- needs inputs of energy.
・The economic development plans implemented since independence necessarily required increasing amounts of energy to remain operational. And hence the consumption of energy is steadily increasing all over the country.
・Thus there is a need to develop a sustainable path of energy development and conserve energy. At present, India is one of the least energy efficient countries in the world.
Ways to conserve energy resources are:
・Using public transport instead of individual vehicles.
・Switching off electricity when not in use.
・Using power saving devices.
・Using non-conventional sources of energy.
Q. Mineral resources are not evenly distributed in India. Justify.
A. India is fairly rich and varied in minerals, however these are unevenly distributed:
・Peninsular rocks contain most of the reserves of coal, metallic minerals, mica and many other non-metallic minerals.
・Sedimentary rocks on the western and eastern flanks of the peninsula, in Gujarat and Assam have most of the petroleum deposits.
Q. Which is the largest bauxite producing State?
A. Odisha
Q. Which region of India contains maximum reserves of coal and metallic mineral?
A. The peninsular region contains maximum reserves of coal and metallic minerals.
Q. Which minerals are indispensable for electrical and electronic industries?
A. Mica, copper, iron ore.
Q. Where is Khetri Mine situated?
A. Rajasthan
Q. Give examples of metallic minerals?
A. (i) Copper
(ii) Silver
(iii) Gold
(iv) Iron ore
(v) Platinum
(vi) Tin
Q. Give examples of non-metallic minerals?
A. (i) Limestone
(ii) Mica
(iii) Coal
(iv) Potash
(v) Sandstone
(vi) Marble
(vii) Granite
(viii) Petroleum
Short Answer Questions
Q. "India's future is very bright in Solar energy". Support the statement.
OR
"Solar energy is becoming popular in rural and remote areas." Justify.
A. Solar energy is becoming very popular in India especially in rural and remote areas because:
・India is a tropical country and thus sunlight is abundant here. Therefore India has enormous possibilities of tapping solar energy.
・Solar energy is renewable and causes much less pollution as compared to other sources of energy.
・It can be easily set up in rural and remote areas as it does not require a power station.
・Solar energy reduces the dependence on firewood and cattle dung cake for energy.
Eg. Dhirubhai Ambani Solar Park (Rajasthan), Mithapur Solar Power Plany (Gujarat), CIAL Solar Power Project (Kerala) etc.
Q. How is tidal energy produced? Explain.
A. ・Oceanic tides can be used to generate electricity. Floodgate dams are built along inlets.
・During high tide, water flows into the inlet and gets trapped when the gate is closed.
・After the tide falls outside the flood gate, the water retained by the floodgate flows back to the sea via a pipe that carries it through a power generating turbine. This is how tidal energy is produced.
Q. Which are the main minerals used to obtain nuclear energy. Name any two states where these minerals are found.
A. The minerals used to obtain nuclear energy are uranium and thorium.
These are available in:
・Jharkhand
・Aravalli ranges of Rajasthan
・Monazite sands of Kerala
Q. Distinguish between ferrous and non-ferrous minerals. Give two examples of each.
A. Ferrous minerals are the minerals which contain iron while non-ferrous minerals are the minerals which do not contain iron.
Examples of ferrous minerals: Iron ore and manganese.
Examples of non-ferrous minerals: Copper and lead.
Q. Describe the specific features of Bellary-Chitradurga-Chikmagalur-Tumakuru belt of iron ore.
A.・This belt is located in Karnataka and has large reserves of iron ore. The Kudremukh mines located in Western Ghats of Karnataka are a 100% export unit.
・Kudremukh deposits are known to be one of the largest in the world.
・The ore is transported as slurry through a pipeline to a port near Mangaluru.
Q. What are the major use of limestone? Mention any two states which are the major producers of limestone.
A. Limestone is the basic raw material for the cement industry and is also used for smelting iron ore in the blast furnace.
It is found mainly in:
・Karnataka
・Andhra Pradesh
Q. Give the essential features of Mica.
A.・Mica is a mineral made up of a series of plates or leaves.
・It splits easily into thin sheets. These sheets can be so thin that a thousand can be layered into a mica sheet of a few centimeters high.
・Mica can be clear, black, green, red yellow or brown.
・Due to its excellent di-electric strength, low power cost factor, insulating properties and resistance to high voltage, mica is one of the most indespensible minerals used in electric and electronic industries.
・In India, it is found in Koderma Gaya- Hazaribagh belt of Jharkhand, northern edge of Chota Nagpur Plateau, in Rajasthan around Ajmer, Nellore mica belt in Andhra Pradesh.
Q. Why has it become necessary to use renewable energy resources?
A. It has become necessary to use renewable energy resources because:
・The growing consumption of energy has resulted in the country becoming increasingly dependent on fossil fuels such as coal, oil and gas.
・Rising prices of oil and gas and their potential shortages have raised uncertainties about the security of energy supply in the future, which in turn has serious repercussions on the growth of national economy.
・Increasing use of fossil fuels also causes serious environmental problems.
Long-Answer Questions
Q. Explain the needs and methods of conservation of minerals.
OR
" India is one of the least energy efficient countries in the world. We have to adopt cautious approaches for the judicious use of our limited energy resources". Analyze the statement.
A. Needs to conserve resources:
・Energy is the basic requirement for economic development. Every sector of the national economy- agriculture, industry, transport, commercial and domestic- needs inputs of energy.
・The economic development plans implemented since independence necessarily required increasing amounts of energy to remain operational. And hence the consumption of energy is steadily increasing all over the country.
・Thus there is a need to develop a sustainable path of energy development and conserve energy. At present, India is one of the least energy efficient countries in the world.
Ways to conserve energy resources are:
・Using public transport instead of individual vehicles.
・Switching off electricity when not in use.
・Using power saving devices.
・Using non-conventional sources of energy.
Q. Mineral resources are not evenly distributed in India. Justify.
A. India is fairly rich and varied in minerals, however these are unevenly distributed:
・Peninsular rocks contain most of the reserves of coal, metallic minerals, mica and many other non-metallic minerals.
・Sedimentary rocks on the western and eastern flanks of the peninsula, in Gujarat and Assam have most of the petroleum deposits.
・Rajasthan with the rock systems of the peninsula, has reserves of many non-ferrous minerals.
・The vast alluvial plains of north India are almost devoid of economic minerals.
Q. What are the uses of Copper? Mention any three of its features.
A. Copper is mainly used in electrical cables, electronics and chemical industries
Its features are:
・It is malleable
・It is ductile
・It is a good conductor
Q. Differentiate between Conventional and Non conventional resources.
A.
Conventional
Resources
|
Non
Conventional Resources
|
These
include firewood, cattle dung cake. Coal. Petroleum, natural gas
and electricity (both hydel and thermal)
|
These
include solar, wind , tidal, geothermal, biogas and atomic energy
|
These
are in use since ages
|
Their
use has been started comparatively recently
|
Most
of these are non renewable. Exception water
|
Most
of these are renewable. Exception Nuclear
|
These
are more economically feasible
|
These
are less economically feasible
|
These
are comparatively less ecofriendly
|
These
are comparatively more ecofriendly
|
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