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Standard XII
Biology
What Is Activated Sludge ?
................
Question
.............. is an alternative source of energy.
A
L.P.G
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B
Ethanol
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C
Wood
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D
Petroleum
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Solution
The correct option is
B
Ethanol
Ethanol can be produced from agricultural wastes with the help of a bacterial or fungal activity.
The bacteria or fungi can perform anaerobic fermentation to produce ethanol.
It can be produced at relatively less cost and acts as a cheap and clean-burning fuel.
This liquid can be used as an alternative source of energy in place of LPG.
Thus, the correct answer is option B.
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NTSE Class X
What Is Activated Sludge ?
Standard XII Biology
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