[short_answer] Petroleum is considered central to many other industries. Explain why petroleum refining is so important to India's industrial development, with examples of industries that depend on it.
Generated by claude-sonnet-4-6 · 2026-06-26 13:31 · grounding rag
Model Answer
Petroleum is called a "nodal industry" because it acts as a central link connecting many other industries.
Importance of petroleum refining:
- It provides fuel for heat, lighting, and machinery lubrication.
- Petroleum refineries supply raw materials to synthetic textile industries (nylon, polyester).
- They support the fertiliser industry by providing petrochemical feedstock.
- Numerous chemical industries depend on refinery by-products.
Thus, a single petroleum refinery stimulates the growth of multiple industries around it, making it vital to India's industrial and economic development.
Source: Chapter 5, Conventional Sources of Energy — Petroleum
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Explanation
- The key phrase examiners expect is "nodal industry" — use it directly as it appears in the textbook.
- Three industries must be named: synthetic textiles, fertilisers, and chemical industries — these are explicitly mentioned in the passage.
- Avoid vague statements; link each industry clearly to petroleum refining.
- At 3 marks, aim for one introductory line + 3 distinct points + a brief conclusion.