Question

Which of the following is not an adavantage of biogas?
a) It burns with blue flame without smoke
b) It helps to improve sanitation of the surrounding
c) It is highly expensive
d) It can be used for domestic lighting

Answer 1

Out of the following the one which is not an advantage of biogas is -

C) it is highly expensive.

This is a disadvantage of biogas because it is necessary for an ideal fuel to be affordable to the common masses. High cost makes a fuel uneconomical.

Answer 2

'It is highly expensive' is an aspect that is not an advantage of biogas. In fact, biogas is not at all extremely expensive.  

Option c)

Explanation:  

• Biogas, as the word suggests, is a form of fuel or better described as a mix of gases that have a biological origin.
• They are created when organic matter is broken down in an environment where oxygen is not present.  This biogas constitutes of methane and a host of other components.  
• Biogas is given more importance now, as it does not have the greenhouse impact as other forms of fuel have. It also helps in using less traditional non-renewable resources.