Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R):
Assertion (A) : Methane is the major gas generated during anaerobic digestion of organic materials.
Reason (R) : Methanotrophs are the key players in anaerobic digestion of organic matter.
In light of the above statements, choose the correct answer from the options given below:
नीचे दो कथन दिए गए हैं, एक को अभिकथन (A) और दूसरे को कारण (R) के रूप में लेबल किया गया है:
अभिकथन (A) : कार्बनिक पदार्थों के अवायवीय पाचन (anaerobic digestion) के दौरान उत्पन्न होने वाली प्रमुख गैस मीथेन (Methane) है।
कारण (R) : मीथेनोट्रॉफ्स (Methanotrophs) कार्बनिक पदार्थों के अवायवीय पाचन में प्रमुख भूमिका निभाते हैं।
उपरोक्त कथनों के आलोक में, नीचे दिए गए विकल्पों में से सही उत्तर चुनिए:
Biogas and Anaerobic Digestion:
- Assertion (A) is TRUE: Anaerobic digestion of organic biomass (cattle dung, crop residues) produces biogas, which predominantly consists of methane ($\text{CH}_4$, 55–70%) and carbon dioxide ($\text{CO}_2$, 30–45%).
- Reason (R) is FALSE: Methane is generated by Methanogens (strictly anaerobic Archaea belonging to Euryarchaeota, e.g., Methanobacterium, Methanococcus). In stark contrast, Methanotrophs are aerobic eubacteria (such as Methylococcus) that consume and oxidize methane into carbon dioxide as their carbon and energy source in the presence of oxygen. Methanotrophs do not produce methane during anaerobic digestion.
Therefore, (A) is true but (R) is false.
Correct Answer: Option 3.
विस्तृत व्याख्या:
Biogas and Anaerobic Digestion (बायोगैस एवं अवायवीय पाचन):
- Assertion (A) is TRUE: Anaerobic digestion of organic biomass (cattle dung, crop residues) produces biogas, which predominantly consists of methane ($\text{CH}_4$, 55–70%) and carbon dioxide ($\text{CO}_2$, 30–45%).
- Reason (R) is FALSE: Methane is generated by Methanogens (strictly anaerobic Archaea belonging to Euryarchaeota, e.g., Methanobacterium, Methanococcus). In stark contrast, Methanotrophs are aerobic eubacteria (such as Methylococcus) that consume and oxidize methane into carbon dioxide as their carbon and energy source in the presence of oxygen. Methanotrophs do not produce methane during anaerobic digestion.
Therefore, (A) is true but (R) is false.
Correct Answer: Option 3.
Explanation not matching this question?
क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?
Report
Want to practice this paper in exam conditions?
क्या आप परीक्षा जैसे माहौल में अभ्यास करना चाहते हैं?
Test yourself in 5-question batch format with timer and hidden answers.
5-प्रश्नों के बैच फॉर्मैट, टाइमर और छिपे उत्तरों के साथ खुद को परखें।
Start Practice Mode →
प्रैक्टिस टेस्ट मोड शुरू करें →