Paper 1 · People, Development and Environment
UGC NET June 2023 (20.06.2023) Shift-I
Regarding pyrolysis, which of the following statements are correct?
- It is a biochemical conversion process
- It is useful for the production of bio-oil
- It yields minimum waste
- Its liquid is a good substitute for heating oil
- It can produce ethanol
A1, 2, 3 & 4 only
B2, 3 & 4 only ✓ Correct
C2, 3, 4 & 5 only
D1, 4 & 5 only
Correct answer: (B) 2, 3 & 4 only — Pyrolysis produces bio-oil, yields minimum waste and its liquid substitutes heating oil, so the answer is 2, 3 and 4.
Explanation
★Pyrolysis produces bio-oil, yields minimum waste and its liquid substitutes heating oil, so the answer is 2, 3 and 4.
★Pyrolysis heats organic material such as biomass in the absence of oxygen.
★It is a thermochemical process, not a biochemical one, so the first statement is wrong.
★It is useful for producing bio-oil, matching item 2.
★It yields minimum waste, matching item 3.
★Its liquid product is a good substitute for heating oil, matching item 4.
★So the correct statements are items 2, 3 and 4.
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