Question

12. Anaerobic bacteria digest animal waste and produce biogas
(Change - A). The biogas is then burnt as fuel (Change – B). The
following statements pertain to these changes. Choose the correct
one.
(i) Process – A is a chemical change.
(ii) Process -B is a chemical change
(iii) Both processes A and B are chemical changes.
(iv) None of these processes is a chemical change​

Answer 1

Answer:

iii) Both processes A and B are chemical changes.

Answer 2

Answer:

(iii) Both processes A and B are chemical changes.