Explanation: A mineral is a naturally occurring substance that has a definite chemical composition and an ordered atomic structure. It is formed by natural geological processes, not in laboratories. Minerals can occur in all types of rocks, not just sedimentary ones.

Explanation: Minerals are non-renewable resources on the human time scale, because they take millions of years to form. They are natural substances, with definite chemical compositions and ordered internal structures. Therefore, statement (d) is incorrect.

Explanation: An ore is a rock that contains a mineral in such quantity that it can be extracted economically. The economic factor—profitability—distinguishes an ore from ordinary rocks that may also contain minerals but in very low or scattered quantities.

Explanation: Minerals provide the base materials for a vast range of industries—iron and steel, cement, chemicals, fertilisers, electronics and more. Without minerals, industrial activity would almost stop. They are not limited to jewellery or fully replaceable.

Explanation: In igneous and metamorphic rocks, mineral-bearing solutions fill cracks and solidify as veins (small deposits) and lodes (larger deposits). Beds and layers are typical of sedimentary rocks, while placer and residual deposits form differently.

Explanation: In sedimentary rocks, minerals like coal, limestone and some iron ores occur as beds or layers, formed by deposition and compaction of sediments over long periods of time.

Explanation: Placer deposits are formed when heavy minerals like gold, tin and platinum are mechanically concentrated in river sands or valley floors. Their high density causes them to settle, making them easy to extract by panning or dredging.

Explanation: Bauxite, the ore of aluminium, is formed as a residual deposit when rocks undergo intense chemical weathering in hot, humid climates. Leaching removes soluble materials and leaves behind insoluble aluminium compounds as bauxite.

Explanation: The Chhota Nagpur Plateau (Jharkhand, Odisha, Chhattisgarh, parts of West Bengal) is India’s richest mineral belt with abundant coal, iron ore, manganese, bauxite and mica. This concentration of minerals supports many heavy industries in the region.

Explanation: Rajasthan and Gujarat form part of the North-Western Region, rich in non-metallic minerals like limestone, gypsum, mica, rock phosphate and salt. This supports cement and chemical industries in the area.

Explanation: The Himalayan Region has only limited deposits of minerals like copper, lead, zinc and gold. Major coal and iron ore belts lie elsewhere, mainly in the peninsular plateau.

Explanation: Ferrous minerals are minerals which contain iron, such as iron ore, manganese and chromite. They are crucial for the iron and steel industry.

Explanation: Hematite is the most important industrial iron ore in India and contains about 60–70% iron. It is widely used in steel-making plants in the country.

Explanation: Manganese is used as a ferro-alloy to remove impurities like sulphur and oxygen and to make steel hard and tough. It is also used in dry cell batteries and paints.

Explanation: Odisha is one of the leading producers of iron ore in India. Mines in Keonjhar, Mayurbhanj and Sundargarh supply iron ore to many steel plants.

Explanation: Copper is a non-ferrous mineral because it does not contain iron. Iron ore, manganese and chromite are ferrous minerals as they contain iron.

Explanation: Bauxite is the chief ore of aluminium. Aluminium is light, strong and resistant to corrosion, making it ideal for aircraft, vehicles and cooking utensils.

Explanation: Rajasthan (Khetri mines) is a major copper-producing state in India. Copper is crucial for electrical wiring and electronic industries due to its high conductivity.

Explanation: Mica is a non-metallic mineral that is a very good insulator, can withstand high temperatures and can be split into thin sheets. These properties make it ideal for electrical and electronic equipment.

Explanation: Limestone is the basic raw material for the cement industry. It is also used as a flux in the iron and steel industry to remove impurities.

Explanation: Granite and sandstone are widely used as building stones for floors, walls and monuments. They are durable and can be cut and polished for construction purposes.

Explanation: Minerals are limited (finite), non-renewable and unevenly distributed. Overuse can lead to exhaustion of deposits and serious environmental damage, so conservation is essential.

Explanation: Exporting all minerals quickly at cheap rates (option b) would actually deplete mineral reserves faster. Recycling, efficient mining and using substitutes are all ways to conserve minerals.

Explanation: Sustainable mining means using scientific and careful methods so that minerals are extracted with minimum environmental damage, reduced wastage and protection of the interests of future generations.

Explanation: Coal is a traditional, widely used conventional source of energy. Solar, wind and tidal energy are non-conventional, newer and renewable sources.

Explanation: Natural gas is considered the cleanest fossil fuel because it burns more completely and emits fewer pollutants and greenhouse gases compared to coal and petroleum.

Explanation: Hydroelectric power uses the potential energy of water stored in dams. When water is released, it turns turbines connected to generators, producing electricity.

Explanation: Wind energy uses the kinetic energy of moving air to rotate wind turbines, which generate electricity. Solar uses sunlight, biogas uses organic waste, and tidal energy uses sea tides.

Explanation: Biogas is produced when organic wastes such as animal dung, agricultural residue and kitchen waste decompose in the absence of oxygen (anaerobic conditions) in biogas plants.

Explanation: Using public transport or car-pooling reduces the number of vehicles on the road, thus saving fuel and reducing pollution. This is a simple but effective way of conserving energy resources in daily life.