Paper 1 · People, Development and Environment
UGC NET December 2021 June 2022 (10.10.2022) Shift-II
Given below are two statements. Statement I: Biodiesel can reduce sulphur emissions significantly in comparison to gasoline. Statement II: The energy density of biodiesel is much less than that of ethanol. In the light of the above statements, choose the correct answer from the options given below.
- Statement I: Biodiesel can reduce sulphur emissions significantly in comparison to gasoline.
- Statement II: The energy density of biodiesel is much less than that of ethanol.
ABoth Statement I and Statement II are correct
BBoth Statement I and Statement II are incorrect
CStatement I is correct but Statement II is incorrect ✓ Correct
DStatement I is incorrect but Statement II is correct
Correct answer: (C) Statement I is correct but Statement II is incorrect — The answer is that Statement I is correct but Statement II is incorrect.
Explanation
★The answer is that Statement I is correct but Statement II is incorrect.
★Biodiesel burns with far less sulphur than gasoline, so Statement I is correct.
★The energy density of biodiesel is about 38 megajoules per kilogram, higher than ethanol's roughly 27.
★So the claim that biodiesel has much less energy density than ethanol makes Statement II incorrect.
★Thus only the first statement holds.
★Biodiesel is both cleaner in sulphur and more energy-dense than ethanol.
★So the answer is that Statement I is correct but Statement II is incorrect.
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