Physics
Grade-10
Easy
Question
Choose the incorrect statement.
- We are encouraged to plant more trees so as to ensure a clean environment and also provide bio-mass fuel.
- Gober gas is produced when crops, vegetable wastes, etc., decompose in the absence of oxygen.
- The main ingredient of biogas is ethane, and it gives a lot of smoke and also produces a lot of residual ash.
- Biomass is a renewable source of energy.
Hint:
The main ingredient of biogas is methane, and it does not give a lot of smoke neither does it leave lot of residues.
The correct answer is: The main ingredient of biogas is ethane, and it gives a lot of smoke and also produces a lot of residual ash.
Option (c) is correct.
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