Social Science (087) — AI-generated practice question

| Basis | Gondwana Coal | Tertiary Coal |
|---|---|---|
| Age | About 200 million years old | About 55 million years old |
| Quality | High grade; includes metallurgical (bituminous) coal | Lower grade coal |
| Distribution | Damodar Valley (Jharia, Raniganj, Bokaro), Godavari, Mahanadi, Son and Wardha valleys | North-eastern states — Meghalaya, Assam, Arunachal Pradesh and Nagaland |

Gondwana coal accounts for the major coal resources of India and is more significant commercially than tertiary coal.

Source: Conventional Sources of Energy, Chapter 5

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• The question asks for three specific points of distinction — age, quality, and distribution — so a table format is ideal and saves words.
• Examiners expect all three parameters to be addressed; missing any one costs a mark.
• Quote exact figures (200 million years / 55 million years) and exact place names from the textbook — these are scoring details.
• The concluding line adds value but keep it brief.