Cattle dung used as a substrate in biogas production is a rich source of . . . . . . .

Which type of carbohydrate,when processed by bacteria,yields the highest amount of methane?

Mohan was writing a report on the benefits of biogas:
$i$. It is cheap and safe
$ii$. Can be used for cooking
$iii$. Can be transported easily
$iv$. Causes pollution
Which one of the above statements has been reported incorrectly?

The bacteria responsible for biogas production are collectively called:

What is the chemical nature of biogas? Name an organism which is involved in biogas production.

Identify the correct statements from the following: