The use of biogas is preferred as a fuel over biomass, as it has all advantages except :
Organic manure gets burnt
It has high calorific value
It does not leave any ash
It helps in keeping the environment clean
Organic manure gets burnt
Explanation for the correct option:
Explanation for incorrect options:
Option B) It has a high calorific value: Biogas has a higher calorific value than biomass because it has a greater content of calorific gases like methane and carbon dioxide. Therefore option B is incorrect.
Option C) It does not leave any ash: It does not leave any ash after burning as it is made up of organic matter like cow dung. Therefore option C is incorrect.
Option D) It helps in keeping the environment clean: Biogas has less production of greenhouse gases like methane, nitrogen, and carbon dioxide therefore it is environment friendly and helps in keeping the environment clean. Therefore option D is incorrect.
Hence, we can conclude that ‘The use of biogas is preferred as a fuel over biomass, as it has all advantages except organic manure gets burnt’.
Final answer: Hence the correct answer is option A.