Question : Biogas is formed through:
Option 1: fermentation
Option 2: oxidation
Option 3: aerobic respiration
Option 4: reduction
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Correct Answer: fermentation
Solution : The correct option is fermentation.
Anaerobic fermentation is a naturally occurring biological process that produces biogas. In the absence of oxygen, microbes break down organic waste, animal dung, sewage, and other organic stuff during this process. Methane (CH4) and carbon dioxide (CO2) are the main gases produced by this fermentation. Biogas is a renewable energy source that may be harvested, collected, and used for a variety of tasks, such as heating, cooking, generating power, and fueling automobiles.
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Question : The working of a dry cell is based on
Option 1: Decomposition reaction
Option 2: Spontaneous oxidation-reduction reaction
Option 3: Combination reaction
Option 4: Electrolysis
Question : Copper is refined by
Option 1: Roasting
Option 2: Oxidation
Option 3: Electrolysis
Option 4: Zone refining
Question : Benzene cannot undergo:
Option 1: substitution
Option 2: addition
Option 3: elimination
Option 4: oxidation
Question : The process of conversion of sugar into alcohol is known as:
Option 1: Denudation
Option 2: Fragmentation
Option 3: Fermentation
Option 4: Infiltration
Question : The oxidation number of Nickel in K4[Ni(CN)4] is
Option 1: 0
Option 2: +4
Option 3: –4
Option 4: +8
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