1
A construction company is planning to build a new highway. They need to source large quantities of limestone for road base and iron ore for steel structures. Based on your knowledge of mineral distribution in India, suggest suitable regions where the company could obtain these minerals efficiently, considering their major producing states. 3marks
2
Assertion: Conventional sources of energy are finite and non-renewable. Reason: Conventional sources are being depleted at a faster rate than they can be replenished by natural processes.(a) Both assertion and reason are true and reason is the correct explanation of assertion.(b) Both assertion and reason are true but reason is not the correct explanation of assertion.(c) Assertion is true but reason is false.(d) Assertion is false but reason is true. 1mark
3
A student is studying the properties of minerals for a science project. They are particularly interested in a mineral that can be easily split into thin, transparent sheets and is used in electrical and electronic industries due to its excellent di-electric strength. Identify this mineral and explain its significance. 2marks
4
Imagine you are a geologist exploring a region with layered rock formations. You discover a mineral deposit that is concentrated in horizontal strata. Based on the mode of occurrence of minerals, what type of rock formation are you most likely exploring, and what kind of minerals might you find there? Give an example. 3marks
5
A rural community in Rajasthan is looking for sustainable energy solutions to reduce their reliance on firewood. They have access to abundant sunlight and a significant amount of animal waste. Suggest two different non-conventional energy sources suitable for this community and briefly explain how they work. 5marks
6
Read the following passage and answer the questions that follow:"India's energy needs are growing rapidly, leading to an increasing dependence on fossil fuels. However, the use of these non-renewable resources poses environmental challenges and raises concerns about future energy security. Therefore, there is a pressing need to explore and utilize alternative energy sources."(a) Identify two major fossil fuels mentioned implicitly or explicitly in the passage.(b) What are the two main concerns associated with the increasing dependence on fossil fuels?(c) Suggest one non-conventional energy source that can help mitigate these concerns in India. 3marks
7
You are advising a village that currently uses cow dung cakes for cooking. The village has access to a nearby stream with a consistent flow of water and a number of shrubs and farm waste. Explain how they can utilize these resources to improve their energy situation, mentioning both potential sources and their benefits. 5marks
8
Assertion: Minerals found in veins and lodes are generally formed when molten material is forced upwards. Reason: This process is common in igneous and metamorphic rocks, leading to the formation of metallic mineral deposits.(a) Both assertion and reason are true and reason is the correct explanation of assertion.(b) Both assertion and reason are true but reason is not the correct explanation of assertion.(c) Assertion is true but reason is false.(d) Assertion is false but reason is true. 1mark
9
A transportation company is looking to reduce its carbon footprint and operational costs. They are considering switching from traditional diesel vehicles to alternatives. Based on the information provided about energy resources, recommend one specific energy source that can be used as a transport fuel and explain its advantage in this context. 2marks
10
Consider the following data for mineral production in India (hypothetical):
| Mineral | Major Producing State 1 | Major Producing State 2 | State with Significant Deposits but Lower Production |
|---|---|---|---|
| Bauxite | Odisha | Gujarat | Jharkhand |
| Copper | Rajasthan | Madhya Pradesh | Jharkhand |
| Iron Ore | Odisha | Chhattisgarh | Goa |
| Interpret this data to explain the uneven distribution of mineral resources in India, using at least two examples from the table. [3 marks] | |||
| 11. A company is developing a new type of electric vehicle battery. They require a mineral that is malleable, ductile, and an excellent conductor, crucial for electrical cables and electronics. Identify this mineral and state two major regions in India where it is found. [2 marks] | |||
| 12. Read the following statement: "Coal is a vital energy resource, but its extraction and usage have significant environmental implications." Elaborate on this statement by explaining (a) why coal is vital, and (b) at least two environmental issues associated with its mining and combustion. [3 marks] | |||
| 13. A family living in a coastal area with significant tidal variations is exploring renewable energy options. Identify the renewable energy source that can be harnessed from tidal variations and briefly describe the process of generating electricity from it. [3 marks] | |||
| 14. Assertion: Petroleum is a non-renewable energy source. Reason: Petroleum is formed from the remains of ancient organisms over millions of years under specific geological conditions. | |||
| (a) Both assertion and reason are true and reason is the correct explanation of assertion. | |||
| (b) Both assertion and reason are true but reason is not the correct explanation of assertion. | |||
| (c) Assertion is true but reason is false. | |||
| (d) Assertion is false but reason is true. [1 mark] | |||
| 15. A student is asked to identify a mineral used as a raw material in the cement industry and also found in sedimentary rocks. Which mineral fits this description and why is it essential for the cement industry? [2 marks] | |||
| 16. Case Study: The National Green Tribunal (NGT) has taken a strong stance against 'Rat-hole' mining in Meghalaya, deeming it illegal and harmful. This method of coal mining involves family members digging narrow tunnels. | |||
| (a) What are the primary reasons cited by the NGT for declaring such mining activities illegal? | |||
| (b) Besides environmental concerns, what other issues might arise from such informal mining practices? | |||
| (c) Suggest an alternative, more sustainable method for coal extraction that could be considered. [5 marks] | |||
| 17. A scientist is investigating geothermal energy in India. They have identified two potential sites where groundwater absorbs heat from rocks, leading to hot springs and the potential for generating electricity. Name these two experimental project locations. [2 marks] | |||
| 18. Explain the difference between veins and lodes, specifying the type of rocks in which they are commonly found and the kind of minerals typically extracted from them. [3 marks] | |||
| 19. Case Study: India possesses significant reserves of iron ore, with states like Odisha, Chhattisgarh, Karnataka, and Jharkhand being major producers. However, the distribution is uneven. For instance, the Bailadila range in Chhattisgarh is known for super high-grade hematite, while the Kudremukh mines in Karnataka are a major export unit. | |||
| (a) Identify the 'fine' iron ore known for its magnetic properties and high iron content. | |||
| (b) Name the major iron ore belt that includes the Bailadila range and one of its key producing states. | |||
| (c) How is iron ore from the Kudremukh mines transported, and where is it exported? [5 marks] | |||
| 20. Assertion: Using substitutes for minerals is a crucial step in mineral conservation. Reason: Substitutes are often derived from renewable resources, thus reducing the pressure on finite mineral deposits. | |||
| (a) Both assertion and reason are true and reason is the correct explanation of assertion. | |||
| (b) Both assertion and reason are true but reason is not the correct explanation of assertion. | |||
| (c) Assertion is true but reason is false. | |||
| (d) Assertion is false but reason is true. [1 mark] |
Answers
1
The company should look to Rajasthan and Madhya Pradesh for copper, as these are major producing states. Jharkhand also has copper deposits but production is lower, so it might be a secondary option. 3marks
2
(a) Both assertion and reason are true and reason is the correct explanation of assertion. (Conventional energy sources are finite resources that are being consumed rapidly, hence they are non-renewable and their depletion rate is high.) 1mark
3
The mineral is Mica. It is indispensable in electric and electronic industries due to its excellent di-electric strength, low power loss factor, and insulating properties. 2marks
4
You are most likely exploring sedimentary rocks. These rocks often contain minerals deposited in beds or layers. Examples include coal and some forms of iron ore. 3marks
5
The community can utilize Solar Energy and Biogas. Solar energy can be harnessed using photovoltaic technology to convert sunlight directly into electricity, reducing the need for firewood. Biogas can be produced from animal waste (like cow dung), providing a fuel for cooking and reducing reliance on firewood and improving manure quality. 5marks
6
(a) Coal and petroleum (mineral oil). (b) The two main concerns are environmental pollution and the uncertainty of future energy security due to the depletion of these finite resources. (c) Solar energy, wind energy, or biogas are suitable non-conventional energy sources. 3marks
7
The village can utilize the stream to generate hydroelectricity using a small turbine (hydro-electricity), which is a renewable resource. The shrubs and farm waste can be used to produce biogas in a 'Gobar gas plant'. This biogas can be used for cooking, providing a cleaner and more efficient alternative to cow dung cakes. Both methods contribute to energy conservation and environmental protection. 5marks
8
(a) Both assertion and reason are true and reason is the correct explanation of assertion. 1mark
9
Natural Gas, specifically Compressed Natural Gas (CNG), can be used as a transport fuel. It is a cleaner-burning fossil fuel compared to diesel and can help reduce both operational costs (due to its efficiency and availability) and carbon emissions. 2marks
10
The uneven distribution is evident from the fact that while Odisha and Chhattisgarh are major producers of iron ore and bauxite, states like Goa and Jharkhand have significant deposits but lower production levels for these minerals. Similarly, while Rajasthan and Madhya Pradesh lead in copper production, Jharkhand has copper deposits but lower output. This indicates that factors like ease of extraction, economic viability, and market proximity influence production levels, leading to uneven distribution of mineral wealth in terms of actual output. 3marks
11
The mineral is Copper. It is found in the Balaghat mines in Madhya Pradesh, Khetri mines in Rajasthan, and the Singhbhum district of Jharkhand. 2marks
12
(a) Coal is vital because it is the most abundantly available fossil fuel in India and provides a substantial part of the nation's energy needs. It is used for power generation, industrial energy, and domestic needs, making it a backbone of the economy. (b) Environmental issues include: (i) Air pollution due to the release of greenhouse gases like carbon dioxide and sulphur dioxide during combustion, leading to global warming and acid rain. (ii) Land degradation and habitat destruction due to mining activities, and water pollution from mining runoff. 3marks
13
The renewable energy source is Tidal Energy. Electricity is generated by building floodgate dams across coastal inlets. During high tide, water flows into the inlet and is trapped. When the tide falls, the trapped water flows back to the sea through a pipe, passing through a power-generating turbine. 3marks
14
(a) Both assertion and reason are true and reason is the correct explanation of assertion. 1mark
15
The mineral is Limestone. It is a basic raw material for the cement industry and is found in sedimentary rocks. Its calcium carbonate content is essential for the chemical reactions that occur during cement production. 2marks
16
(a) The NGT likely declared these activities illegal due to severe environmental degradation, unsafe working conditions for miners, and lack of regulation. Rat-hole mining can lead to land subsidence, water pollution, and air pollution. (b) Other issues might include exploitation of workers, lack of safety equipment, potential for accidents (like mine collapses or flooding), and tax evasion. (c) An alternative could be mechanized mining with strict safety and environmental regulations, ensuring proper ventilation, waste disposal, and worker safety, or exploring alternative energy sources that do not rely on coal extraction. 5marks
17
The two experimental project locations for geothermal energy in India are: (1) Parvati Valley near Manikaran in Himachal Pradesh and (2) Puga Valley in Ladakh. 2marks
18
Veins and lodes are mineral occurrences found in cracks, crevices, faults, or joints, typically in igneous and metamorphic rocks. Veins are smaller occurrences, while lodes are larger. These formations often contain metallic minerals like tin, copper, zinc, and lead, which are formed when mineral-rich molten or gaseous materials are forced upwards and solidify. 3marks
19
(a) Magnetite is the finest iron ore with a very high content of iron up to 70% and excellent magnetic qualities. (b) The Durg-Bastar-Chandrapur belt lies in Chhattisgarh and Maharashtra. The Bailadila range of hills in the Bastar district of Chhattisgarh is part of this belt and is known for super high-grade hematite iron ore. (c) Iron ore from Kudremukh mines is transported as slurry through a pipeline to a port near Mangaluru and is exported to Japan and South Korea. 5marks
20
(a) Both assertion and reason are true and reason is the correct explanation of assertion. 1mark
