Minerals and Energy Resources | Ncert Cbse Class X
Geography - Contemporary India II
Answers of CCE type Sample Questions and MCQ
Multiple Choice Questions (MCQ)
Answer: 1-a. 2-b. 3-c. 4-c. 5-a. 6-a. 7-a. 8-b. 9-b. 10-c. 11-c. 12-c. 13-a. 14-a. 15-a.
CCE type Sample Questions
Answer.1:
Open cast or Open-pit mining: It refers to a method of extracting rocks or minerals
by removing the overlying materials (over burden) from shallow depth. Open-pit
mines are used en deposits of commercially useful minerals or rocks are found
near the surface, that is, where the overburden can be removed economically.
Quarry: It is used
for extracting materials such as stones etc. Quarry is usually shallower than
open-pit mines.
Shaft mining: When minerals
occur deep below the surface, where the overburden is thick, or the mineral
occurs as veins in hard rocks, then underground shaft mining is done to extract
the ore. Shaft mines have vertical access to the seam via elevators that carry
workers and equipment into the mines. Shaft mining is a method of mining in
which vertical and horizontal shafts are made to extract the materials from
deep under the earth surface.
Answer.2:
1. In igneous and
metamorphic rocks as cracks, crevices, faults, and joints.
2. In beds and
layers of sedimentary rocks by accumulation and concentration.
3. By
decomposition of surface rocks e.g. Laterite, Bauxite.
4. Alluvial
deposits in sands of valleys and along the sea coast or foot hills as “placer
deposits”.
Answer.3:
The reasons are –
1. High risks
involved.
2. Due to
poisonous fumes, mines are vulnerable to workers for pulmonary diseases.
3. Contaminated
water sources.
4. Fires in
coal mines, risks of collapsing mine roofs (top surface).
Answer.4:
Natural Gas
1. It is a
mixture of combustible gaseous hydrocarbons occurring in the rocks of earth
crust.
2. It is a
commercial energy.
3. Used as raw
material in petrochemicals.
4. Can be
transported through pipelines to any long distance.
5. Mostly used
in urban areas in India.
Bio Gas
1. It is derived from organic wastes
such as waste of animals and plants with the help of
microorganism in presence
of water.
2. Non commercial energy.
3. It is produced in tanks.
4. Can be found mostly in rural areas.
Answer.5:
The
reasons are –
1. Hot and arid
region getting maximum sun radiations.
2. Clear skies
almost throughout the year.
3. Cheaper
installation.
4. Renewable
and pollution free energy source.
5. Government
motivation.
Answer.6:
Most of the petroleum producing areas in India
are associated with anticlines and fault traps in rock formations of Tertiary
age. In the region folding, anticlines or domes, it occurs where oil is trapped
in the crest of the folding rock strata. Petroleum is also found in fault traps
between porous rocks like – sandstone, limestone etc.
Major petroleum producing regions in India are –
1. Assam producing 16% of total production – Digboi,
Naharkata, Moran-Hugrijan, Namdang.
2. Gujarat producing 18% of total production –
Ankleshwar, Lunez, Navgam.
3. Mumbai High producing 63% of total production.
4. Godawari – Mahanadi basin.
Answer.7:
Satluj river.
Answer.8:
Mahanadi river.
Answer9:
Tilayya, Konar, Maithan, Panchet dams.
Answer.10:
Narora (UP), Rawatbhatta (Rajasthan), Tarapur
(Maharashtra), Kaiga (Karnataka), Kalapakkam (Tamil Nadu).
Further Study on
the chapter ‘Minerals and Energy Resources’
Class 10 Ncert
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Contemporary India II Exercise Questions [Read]
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