A Market with His Parents. They Purchased: Understanding Industrial Goods in Class 10 Social Science

Understanding Mineral-Based Industries in Class 10 NCERT

Mineral-based industries use minerals and metals as their main raw materials. These industries are crucial because they provide essential materials for other sectors. For example, the iron and steel industry is called a basic industry since it supplies raw materials to many other industries like engineering, defense, and consumer goods.

Steel is considered an indicator of a country's development because of its widespread use. It is a heavy industry due to the bulk and weight of its raw materials and finished products, which require efficient transportation.

The main raw materials for steel production are:

• Iron ore
• Coking coal
• Limestone

These are used in the approximate ratio of 4:2:1. Manganese is also added to harden the steel. Steel plants are ideally located near sources of these raw materials and have good transport links to markets.

The Aluminium Industry: Lightweight and Versatile

Aluminium smelting is the second most important metallurgical industry in India. Aluminium is valued for being:

• Light
• Corrosion-resistant
• Malleable
• A good conductor of heat

It is widely used in aircraft manufacturing, utensils, and electrical wires. The raw material for aluminium is bauxite, which is bulky and reddish in colour.

Aluminium plants need a regular and cheap electricity supply because the smelting process consumes a lot of energy. Key aluminium-producing states include Odisha, West Bengal, Kerala, Uttar Pradesh, Chhattisgarh, Maharashtra, and Tamil Nadu.

Aluminium Production Process (Simplified)

1. Mining bauxite 2. Refining bauxite to alumina 3. Smelting alumina to produce aluminium metal

This process requires significant energy input, making electricity availability critical.

Chemical, Fertilizer, and Cement Industries: Diverse Mineral-Based Sectors

Chemical industries produce a wide range of products, including inorganic chemicals like sulphuric acid and nitric acid, and organic chemicals such as petrochemicals used for synthetic fibres, plastics, and pharmaceuticals.

The fertilizer industry produces nitrogenous, phosphatic, and complex fertilizers. India imports potash because of limited reserves.

The cement industry uses raw materials like limestone and gypsum, which are bulky and require coal, electricity, and good transport for production.

These industries are important for agriculture and construction, supporting India's economy.

Locating Industries: Why Geography Matters

The location of mineral-based industries depends on several factors:

• Proximity to raw materials: To reduce transportation costs.
• Availability of cheap labour: To keep production costs low.
• Transport facilities: For moving bulky raw materials and finished goods.
• Market potential: To ensure demand for products.
• Power supply: Especially for energy-intensive industries like aluminium smelting.

For example, the Chhotanagpur plateau region has many iron and steel plants because it has abundant iron ore, coal, and limestone, along with cheap labour and good markets.

Similarly, aluminium plants are located near bauxite mines and places with reliable electricity.

Worked Example: Calculating Raw Material Ratio for Steel

If a steel plant uses 400 tonnes of iron ore, how much coking coal and limestone are needed?

Given ratio: Iron ore : Coking coal : Limestone = 4 : 2 : 1

• Coking coal = (2/4) × 400 = 200 tonnes
• Limestone = (1/4) × 400 = 100 tonnes

Thus, for 400 tonnes of iron ore, 200 tonnes of coking coal and 100 tonnes of limestone are required.

Environmental Impact and Sustainable Industrial Practices

Industries often cause environmental pollution by releasing harmful gases, smoke, and untreated waste into air, water, and soil. This leads to:

• Air pollution
• Water contamination
• Soil degradation

To minimise environmental degradation, industries should:

• Adopt cleaner technologies
• Treat waste before disposal
• Use renewable energy sources
• Follow environmental laws strictly
• Promote recycling and afforestation

These steps help balance industrial growth with environmental protection, a key topic in Class 10 NCERT Social Science.