Q: Which one of the following statements about biogas is not correct ?
(a)It is mainly composed of methane gas.
(b)It is a non-renewable source of energy.
(c)It is formed by the decomposition of cow dung in the absence of oxygen.
(d)It burns without smoke and leaves no residue.
Correct Answer: (b)
The correct answer is (d) 'It burns without smoke and leaves no residue.'. This question from the Science & Technology domain tests knowledge of Computer & Information Technology.