Identify the non-conventional source of energy.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Solar energy
Option (1) Coal — Incorrect. Coal is a fossil fuel: it uses an exhaustible raw material, so it is a conventional source.
Option (2) Petroleum — Incorrect. Petroleum is also a fossil fuel and a conventional, exhaustible source of energy.
Option (3) Natural gas — Incorrect. Natural gas is found with petroleum and is likewise a conventional fossil fuel.
Option (4) Solar energy — Correct. Non-conventional sources are the renewable ones, such as solar, wind, hydro-geothermal and biomass. They are more evenly spread and environment-friendly.
NCERT (2025-26): “Non-Conventional Energy Sources … Fossil fuel sources, such as coal, petroleum, natural gas and nuclear energy use exhaustible raw materials. Sustainable energy resources are only the renewable energy sources like solar, wind, hydro-geothermal and biomass. These energy sources are more equitably distributed and environment-friendly. The non-conventional energy sources will provide more sustained, eco-friendly cheaper energy after the initial cost is taken care of.…” |