Anaerobic bacteria digest animal waste and produce bio-gas (Change-A). The bio-gas is then burnt as fuel (Change-B). The following statements pertain to these changes. Choose the correct one
Process-A is a chemical change.
Process-B is a chemical change.
Both processes A and B are chemical changes.
None of these processes is a chemical change.
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Change A and change B both are chemical changes.
As both the reaction are irreversible, they lead to the formation of new substances.
Animal waste --------------->Bio gas
bio gas ------------------------->CO2
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