Energy and Resource Distribution

• Statement 1 is correct and is the defining commercial problem of Indian coal. Because the Gondwana coals were formed by the drifting in of plant material into basins carrying large quantities of mineral matter, the ash is distributed through the coal substance itself rather than concentrated in partings, and run of mine ash typically runs from thirty five to fifty per cent. This intergrown mineral matter is also why Indian coal washes poorly.
• Statement 2 is correct: sulphur content is generally low, commonly under one per cent in the Gondwana coals, which is a real advantage since it means lower sulphur dioxide emission per tonne burnt and it is one reason flue gas desulphurisation was long treated as a lower priority in Indian thermal plants than particulate control.
• Statement 3 is incorrect and is the item on which the whole question turns. The ash of Indian coal is rich in alumina and silica and poor in the iron, calcium and alkali fluxes that lower the melting point, so the ash fusion temperature is high, generally above about 1400 degrees Celsius. That is favourable for boiler operation, since high fusion temperature reduces slagging and clinker formation on furnace walls, but it makes the ash abrasive and difficult in gasification and in some metallurgical uses. The official answer (a) follows. Elimination narrows the field but cannot close it: statements 1 and 2 are both secure to a prepared candidate, which removes options (b) and (c), after which the choice between (a) and (d) rests wholly on the ash fusion temperature.

• Statement 1 is incorrect on both of its limbs. Coalbed methane is adsorbed on the internal surfaces of the coal matrix and is released when reservoir pressure is lowered by dewatering; it is predominantly methane, typically above ninety per cent, but is not pure, carrying carbon dioxide, nitrogen and traces of heavier hydrocarbons. Shale gas is not a mixture of propane and butane. It is natural gas generated and retained within a fine-grained organic-rich source rock, and it too is predominantly methane, which is why it is produced into the same gas infrastructure. The examiner has attached a false composition to shale gas to see whether the candidate treats the two as chemically different resources when in fact they differ in the rock that holds the gas and the technique needed to release it, not in what the gas is.
• Statement 2 is incorrect. Shale gas resources had been identified in India well before this paper, the prospective basins being Cambay, Krishna-Godavari, Cauvery, Damodar Valley, Assam-Arakan, Vindhyan and Rajasthan, and ONGC had drilled an assessment well in the Damodar Valley in West Bengal in 2011. Both statements failing, the official answer is (d).
• Statement 1 carries the elimination on its own, since the description of shale gas as propane and butane only is chemically wrong on any account and its rejection removes (a) and (c), leaving statement 2 to decide between (b) and (d).

• Option (c) is correct. India holds large coal reserves but very little of coking quality: the Jharia field is the principal source of prime coking coal and is depleted and afflicted by underground fires, and Indian coal generally carries high ash of the order of twenty to forty five percent because it was formed from drift deposits, which makes it unsuitable for the blast furnace route without washing and blending. Integrated steel plants therefore import metallurgical coal, mainly from Australia, and coking coal is consistently among India's largest bulk imports by value.
• Option (a) is wrong: saltpetre, potassium nitrate, belongs to the manufacture of gunpowder, fertilizer and glass and has no role in steelmaking.
• Option (b) is wrong: rock phosphate is a phosphatic fertilizer feedstock, in which India is indeed heavily import dependent, but it is not a steel input, and it is here to catch the candidate who remembers the import dependence without remembering the industry.
• Option (d) fails once either of the first two is rejected. The governing distinction is between the quantity of a resource and its quality, India's coal problem being one of grade rather than of volume.

• Statement 1 is incorrect as at the date of the examination. The largest solar park in India was the Bhadla Solar Park in Jodhpur district of Rajasthan, developed on land whose extreme aridity and high irradiance make it useless for almost anything else, and which was at the time among the largest such installations in the world.
• Statement 2 is correct. Cochin International Airport in Kerala became the first airport anywhere to run fully on solar power, with generation from installations around the airport including on rooftops and in an adjoining solar farm, work for which it received the United Nations Champions of the Earth award.
• Statement 3 is incorrect. The largest floating solar photovoltaic projects in India are on reservoirs in the Telangana and Andhra Pradesh region, the Ramagundam installation on a reservoir of the NTPC plant being the largest at the time; Goa hosts no project of that scale. Only statement 2 stands, giving (b), and options (a), (c) and (d) each accept a misattributed superlative.

All three statements are absolute negatives and each falls to a single counter example.

• Statement 1 is incorrect, since coastal thermal stations such as those in Tamil Nadu, Gujarat and Andhra Pradesh use seawater for once through condenser cooling, which is one of the reasons imported coal plants are sited on the coast.
• Statement 2 is incorrect, and this is a well documented concern: a substantial share of India's coal fleet sits in water stressed districts of Maharashtra, Telangana, Madhya Pradesh and Chhattisgarh, and plants have repeatedly shut down for want of cooling water.
• Statement 3 is incorrect, private ownership being substantial through Tata Power, Adani Power, JSW and others, alongside NTPC and State generating companies. None stands, giving (d). The sweeping word none in each statement is itself the strongest clue at the exam.

• Statement-II is correct. The Suez Mediterranean pipeline runs from Ain Sukhna on the Gulf of Suez, an arm of the Red Sea, to Sidi Kerir near Alexandria on the Mediterranean.
• Statement-I is correct in the sense intended. The pipeline is a strategic alternative and complement to the Suez Canal, allowing cargo to be offloaded, piped across Egypt and reloaded, which both bypasses draught limits on the largest tankers and provides redundancy if the canal is blocked.
• Statement-II supplies the reason for Statement-I, since it is exactly the Red Sea to Mediterranean connection that makes the pipeline a route from the Gulf to Europe, so (a) follows.
• Option (b) fails because the explanatory link is direct.
• Options (c) and (d) fail because both statements are accepted as correct.

• Statement I is correct: India was admitted to the Minerals Security Partnership, the US-led plurilateral aimed at securing resilient critical mineral supply chains, in 2023.
• Statement II is incorrect and is the decisive elimination. The Ministry of Mines identified 30 critical minerals precisely because India is import-dependent or resource-deficient in most of them, including lithium, cobalt, nickel, germanium and the heavy rare earths. Identifying a mineral as critical is an admission of vulnerability, not of endowment, so the word all makes the statement self-defeating.
• Statement III is correct: the MMDR Amendment Act, 2023 inserted a list of critical and strategic minerals in Part D of the First Schedule and reserved to the Central Government the power to auction mining leases and composite licences for them, while royalty continues to accrue to the States. Since only I and III stand, the answer is (c).
• Options (a), (b) and (d) all require Statement II, which cannot survive the logic of the critical minerals list itself. A candidate who understood why the list was drawn up could eliminate three options without knowing either of the other two facts.

• Statement I is incorrect, and the ranking is the reverse of what is asserted. The United States is the world's largest producer of fuel ethanol, accounting for roughly half of global output, with Brazil second at somewhere near a quarter to a third. Brazil has the longer history, having built its Proalcool programme after the oil shocks of the nineteen seventies and pioneered flex fuel vehicles, and this priority in time is very likely the source of the mistaken belief that it leads in volume.
• Statement II is correct. The United States relies overwhelmingly on corn, converting starch to fermentable sugars through enzymatic hydrolysis, whereas Brazil uses sugarcane, whose sucrose is directly fermentable and whose bagasse can be burnt to power the mill, giving the Brazilian route a considerably better energy balance and lower cost per litre. Since I fails and II holds, the answer is (d).
• Options (a) and (b) both require the production ranking to be correct.
• Option (c) inverts the position entirely, accepting the false ranking while rejecting the well-established feedstock difference.