Question

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.​

Answer 1

Answer:

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