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Question
Why bio-gas is also termed as gobar gas?
Options:
A .  Gobar gas is a gas which is produced from biomass hence, the name.
B .  Gobar is the major constituent of the slurry which is used in the production of bio-gas.
C .  Gobar constitutes 99% of the bio-gas.
D .  Bio-gas can be produced only by gobar.
Answer: Option B
:
B
A slurry of cow dung and water is made in the mixing tank from where it is fed into the digester. As the starting material is cow dung, hence the name gobar gas.

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