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Sources of Energy — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceSources of Energy1 Mark
MCQ
The main constituent of bio $-$ gas is.
  • ✓
    Methane.
  • B
    Carbon dioxide.
  • C
    Hydrogen.
  • D
    Hydrogen sulphide.
✓

Answer

Correct option: A.
Methane.
Main constituent of biogas is methane $(75\%)$ biogas is formed by the slurry $($mixture of cow dung and water$)$ this slurry is fed into the digester in which the decomposes convert it into methane hydrogen sulphide in absence of oxygen.
  1. It is renewable sources of energy.
  2. Good manure is formed.
  3. It has good calorific value.
  4. It is environment friendly.

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