Question
In which of the following methods solid wastes are broken down through process of destructive distillation in an oxygen free atmosphere into gases ?
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
Pyrolysis
Solid Waste Decomposition via Destructive Distillation
The question asks for a method where solid wastes are decomposed using destructive distillation in an environment lacking oxygen, resulting in the formation of gases.
Let's examine the options based on this definition:
- Incineration: This process involves burning waste with a sufficient supply of oxygen, producing heat, ash, and gases. It is not oxygen-free.
- Pyrolysis: This is a thermochemical process that decomposes organic materials at elevated temperatures in an inert atmosphere (or absence of oxygen). It utilizes destructive distillation to break down solid waste into gases, liquids (oils/tars), and solid char. This matches the question's criteria.
- Composting: This is an aerobic (oxygen-present) biological process where microorganisms decompose organic waste. It does not involve destructive distillation.
- Burning in multiple hearth furnaces: This is a specific type of incineration, which requires oxygen for combustion.
Therefore, Pyrolysis is the method that fits the description of solid waste breakdown through destructive distillation in an oxygen-free atmosphere into gases.
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