Question

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:

(iv) NONE OF THESE PROCESS IS A CHEMICAL CHANGE

Answer 2

none of the process because it is not a natural resource which give fuel and oil and animal after eating will produce only dungs