Class 10 Social Science (Geography) Chapter 5 Minerals and Energy Resources

Key Concept :- Mica Locations

d) Jharkhand
[Solution Description]
Major mica deposits are located in several regions of India, including the Koderma-Gaya-Hazaribagh belt in Jharkhand. This region is well-known for its abundance of mica reserves.

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Key Concept : Mineral Utilization, Mineral Dependency

c) Cement production

[Solution Description] Limestone is primarily used in the cement industry and for smelting iron ore. In cement production, limestone acts as a source of calcium that combines with silica to form an intermediate product called clinker which is then ground into cement. Therefore, any disruption in the supply of limestone will directly affect cement production.

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Key Concept :- Location Matching

c) Karnataka
[Solution Description] According to the syllabus, the Kudremukh mines are located in Karnataka as part of the Ballari-Chitradurga-Tumakuru belt. This requires matching the location with the correct state known for its iron ore reserves.

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Key Concept :- Location Identification

c) Jharkhand
[Solution Description] The Koderma-Gaya-Hazaribagh belt in Jharkhand is renowned as a major producer of mica in India, particularly on the northern edge of the Chota Nagpur plateau.

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Key Concept :- Solar Usage

c) Rural and remote areas
[Solution Description] Solar energy is becoming increasingly popular in rural and remote areas of India due to its ability to provide electricity without the need for grid connectivity.

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Key Concept: Geological Locations

c) Copper
[Solution Description] Balaghat mines, located in Madhya Pradesh, are famous for being one of India’s major sources of copper production.

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Key Concept :- Economic Viability

b) Mineral content concentration
[Solution Description] The economic viability of extracting a mineral is primarily determined by the concentration of the mineral within the ore. High concentrations reduce costs associated with extraction processes, making it more economically feasible.

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Key Concept :- Component Recognition

c) Turbine
[Solution Description] When water trapped behind floodgate dams during high tide is released, it flows through turbines. These turbines convert the kinetic and potential energy of the moving water into mechanical energy, which is then converted into electrical energy.

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Key Concept :- Basic Definition

d) It conserves mineral resources.
[Solution Description] Recycling metals reduces the need for new mining operations, conserves natural resources, and decreases environmental pollution.

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Key Concept :- Renewable Energy

a) Solar energy
[Solution Description] Renewable energy sources are those that are naturally replenished on a human timescale. Among the options provided, solar energy is a renewable resource as it is derived from the sun and constantly available.

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Key Concept :- Pipeline Network Analysis, Economic Impact

c) It enhanced employment opportunities and industrial growth.
[Solution Description] The HVJ pipeline has facilitated regional development by providing a reliable supply of natural gas to industries and households. This has led to increased industrial output, job creation, and reduced energy costs. As industries have better access to affordable and clean fuel, productivity and competitiveness have improved, contributing to economic growth in these regions.

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Key Concept : Mineral Substitutes

c) They help preserve natural resources.

[Solution Description]

Using substitutes for scarce minerals can help conserve natural resources by reducing the demand for the original scarce minerals. This reduces the rate of mineral depletion and supports sustainable practices by relying less on non-renewable sources.

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Key Concept :- Mineral Functions

b) Preventing cavities
[Solution Description]
Fluoride is added to toothpaste primarily for its ability to prevent dental cavities. It helps by remineralizing tooth enamel and inhibiting the growth of harmful oral bacteria, which can cause decay.

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Key Concept :- Coal Types

d) Anthracite
[Solution Description] Anthracite is known as the highest quality of coal due to its high carbon content and heating capacity. It undergoes more pressure and heat compared to other types of coal.

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Key Concept :- Policy Implications, Strategic Importance

c) It enhances energy security due to domestic availability.
[Solution Description]
India’s focus on using thorium instead of uranium has several strategic policy implications due to the following reasons:

1. Abundance: Thorium is more abundantly available in India compared to uranium, especially in the monazite sands of Kerala.

2. Energy Independence: Utilizing thorium could enhance India’s energy independence by reducing reliance on imported uranium.

3. Safety and Efficiency: Thorium reactors are considered safer because they operate at low pressures and have inherent safety features.

4. Long-term Viability: Thorium-based fuels generate less long-lived radioactive waste and are more sustainable in the long run.

Given these factors, developing and implementing thorium-based nuclear technology aligns closely with enhancing energy independence while addressing safety concerns.

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Key Concept: State Ranking

a) Jharkhand, Maharashtra, Chhattisgarh
[Solution Description]
According to the production share data provided in the syllabus for 2018-19:
– Jharkhand has a production share of 10%.
– Chhattisgarh has a production share of 6%.
– Maharashtra also has a production share of 6%.

Therefore, the correct descending order is Jharkhand, followed by Maharashtra and Chhattisgarh, which have equal shares.

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Key Concept :- Occurrence Location

c) Valley floors and base of hills
[Solution Description] Placer deposits are generally found in valley floors and the base of hills due to the accumulation of minerals that are resistant to being carried away by water.

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Key Concept :- Economic Analysis, Sustainability Evaluation

c) Hydroelectric power has high setup costs but lower operational costs.
[Solution Description] Hydroelectric power plants generally have a higher initial setup cost due to the construction of dams and reservoirs. However, they benefit from lower operational costs since they do not require fuel purchases, unlike thermal power plants that involve ongoing fuel expenses. Hence, hydroelectric power is more cost-effective in terms of operations over time.

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Key Concept :- Policy Evaluation, Safety and Technology

c) Strict safety regulations coupled with advanced geosensor monitoring systems
[Solution Description]
Preventing mine roof collapses involves addressing structural integrity through policies and technology. Stricter safety regulations mandating regular inspections and maintenance are essential. Combined with this, technological advances like the use of real-time monitoring systems using geosensors can help identify potential weak points in the structure before a collapse occurs. This integration ensures proactive measures, enhancing the overall stability of mine roofs.

Hence, the most effective combination is:

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Key Concept : Geothermal Energy Process

b) Steam turbines

[Solution Description] In a geothermal power plant, the primary method of converting geothermal energy into electricity involves using steam or hot water from beneath Earth’s surface to drive turbines connected to generators. The steam produced from the high temperature of the earth’s crust drives a turbine which then activates a generator that produces electricity.

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Key Concept :- Basic Concepts

c) Assertion is true, but Reason is false.
[Solution Description] The statement that minerals in India are nationalized is true as this allows for centralized regulation and control over extraction and distribution. However, the assertion that all mineral resources belong solely to the individuals who discover them is false because mineral resources are considered public assets under governmental regulations in India, not personal property of individuals.

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Key Concept :- Mineral Properties

c) Taste
[Solution Description] Geologists do not use taste as a property to classify minerals. The other properties like color, hardness, and density are commonly used for classification.

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Key Concept :- Critical Thinking, Comparative Analysis

d) Solar energy
[Solution Description] The ideal solution involves understanding the constraints of urban areas, such as limited space, while maximizing environmental benefits and economic feasibility. Solar panels can be installed on rooftops, making them suitable for urban settings. They offer significant environmental advantages by reducing carbon emissions and are becoming economically feasible due to decreasing costs.

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Key Concept :- Copper Usage

d) Its conductivity
[Solution Description] Copper is extensively used in electronics and chemical industries due to its high conductivity, malleability, and ductility. These properties make it easy to form into wires and other shapes that are essential for electronic components and various industrial processes.

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Key Concept :- Mineral Examples

b) Bauxite
[Solution Description] Bauxite is a primary example of minerals that form through the process of residual deposition. This is mentioned in the syllabus as such.

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Key Concept :- Geothermal Gradient

b) High temperatures at shallow depths
[Solution Description] A high geothermal gradient means that the temperature increases significantly with decreasing depth, leading to higher temperatures at shallower depths compared to areas with a normal gradient.

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Key Concept :- Location Identification

d) Tamil Nadu
[Solution Description] The largest wind farm cluster in India spans from Nagarcoil to Madurai, located in Tamil Nadu.

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Key Concept :- Policy Implications, Real-world Application

b) Subsidizing installation costs for small-scale biogas plants using agricultural waste.
[Solution Description] Providing subsidies for biogas plant installations will make it financially feasible for farmers to convert agricultural waste into energy, promoting biogas usage effectively as compared to increasing taxes or reducing research funding.

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Key Concept :- Ore Content Comparison

a) Magnetite
[Solution Description] Magnetite is known to have up to 70% iron content, whereas Hematite contains about 50-60% iron content. Therefore, Magnetite has the highest iron content among the given types.

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Key Concept :- Technological Integration, Resource Distribution

c) Integrated Gasification Combined Cycle (IGCC)
[Solution Description] Integrated Gasification Combined Cycle (IGCC) is a cutting-edge technology used in coal-based power plants that converts coal into gas before combustion. This process facilitates more efficient power generation and reduces pollutants like sulfur dioxide and nitrogen oxides compared to traditional coal-burning techniques. IGCC represents a significant step towards cleaner coal technology by improving efficiency and minimizing environmental impacts.

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Key Concept :- Mineral Resource Management, Mineral Economic Viability

b) Conservation, market proximity, and technological advancements.
[Solution Description] Maintaining the economic viability of mineral resources hinges on several critical factors: the concentration of minerals affects how easily they can be extracted, proximity to markets influences transportation costs, and ease of extraction determines feasibility. Abundance alone is not sufficient if extraction costs are prohibitively high or markets are distant. Considering these factors enables sustainable management.

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Key Concept : Geological Structures

a) Veins and lodes

[Solution Description] In igneous and metamorphic rocks, minerals usually occur in veins and lodes. These are distinct formations where minerals have filled cracks and fractures, making them accessible for mining.

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Key Concept :- Specific Mineral Formation

b) Gypsum
[Solution Description] Minerals like gypsum, potash salt, and sodium salt are known to form in sedimentary rocks through the process of evaporation. This is particularly true in arid regions where water evaporates and leaves behind the minerals.

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Key Concept :- Resource Management

c) Utilization of public transport
[Solution Description] The use of public transport significantly aids in sustainable resource management by reducing individual car usage, decreasing fossil fuel consumption, lowering greenhouse gas emissions, and alleviating traffic congestion in urban areas.

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Key Concept : Resource Distribution

d) Kerala

[Solution Description]

Thorium is particularly abundant in the Monazite sands of Kerala. This distinguishes Kerala as a significant source of Thorium reserves. Thus, option d) Kerala is the correct answer.

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Key Concept :- Mineral Location

c) Veins and lodes
[Solution Description] Major metallic minerals like copper and zinc are commonly found in veins and lodes within igneous and metamorphic rocks.

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Key Concept :- Process Details

c) Evaporation
[Solution Description] Sodium chloride is commonly extracted from ocean water via the process of evaporation. This involves evaporating the water and leaving behind the solid salt crystals. The seawater is usually captured in shallow ponds, where solar energy helps to speed up the evaporation process, resulting in crystallization of salt.

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Key Concept :- Comparative Analysis, Economic Significance

b) Mumbai High holds a leading position due to its larger reserves and greater economic contributions.
[Solution Description] Mumbai High is one of India’s largest offshore oil fields and plays a vital role in the country’s energy sector, contributing significantly to crude oil production. In contrast, Gujarat, while also being a crucial center for oil production owing to its favorable geological conditions, does not match Mumbai High’s scale of output. Economically, Mumbai High’s extensive operations have far-reaching impacts, boosting sectors like transportation and refining, whereas Gujarat’s contribution supports regional development through smaller-scale industries. Thus, Mumbai High has a higher economic significance owing to larger reserves and output capacity.

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Key Concept : Economic Impact, Policy Implications

d) Implementation of stricter safety regulations leading to increased operational costs.

[Solution Description] Frequent mine roof collapses can severely impact the local economy by causing job insecurity among miners and reducing productivity. From a policy perspective, these incidents necessitate stricter safety regulations to prevent recurrence and ensure miner safety. This not only involves immediate financial costs for implementing new measures but also longer-term policy adjustments that might include incentives for safer technologies or penalties for non-compliance.

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