UPSC CSE Prelims
Question 71
In the context of which one of the following are the terms 'pyrolysis and plasma gasification' mentioned?
View correct answer and explanation
Correct answer: D
Correct Option: D
Explanation:
Pyrolysis thermally decomposes waste in low-oxygen conditions, and plasma gasification uses high-energy ionised gas to convert waste into syngas and residues. Both are considered waste-to-energy approaches.
Option-wise Analysis:
A (Incorrect): Rare-earth extraction uses mineral processing methods, not these waste conversion methods as a pair.
B (Incorrect): Natural gas extraction concerns underground reservoirs and drilling.
C (Incorrect): Although generated syngas may contain hydrogen, these methods are not primarily automobile technologies.
D (Correct): Both terms refer to thermal waste-treatment/energy-recovery methods.