Question

cow dung to biogas is reversible or irreversible change

Answer 1

it is irreversible because you can't change biogas again to cowdung

Answer 2

Answer:

Cow dung can be changed into Bio-gas but, Bio-gas cannot be changed again into Cow dung. Hence, the change is irreversible.

Explanation:

Cow dungs are the undigested residue of food and water that has been passed from the animal’s gut. The product often darkens as soon as it is exposed to the air and has a blackish or brownish color.  It is mostly used as a source of fuel to generate heat and electricity in the rural communities of India, Nepal, Bangladesh, etc. They are also used as agricultural fertilizers.