Question

Which of the following is not an example of a biogas source of energy?
A) Wood
B) Gobar
C) Nuclear Energy
D) Coal

Answer 1

Hint: On breakdown of organic matter in absence of oxygen, primarily methane and carbon dioxide are produced. A mixture of these gases is called biogas. Biogas is a naturally produced fuel, made by the decomposition of natural substances. It was made with the motive of creating an eco-friendly source of energy.

Complete step by step solution:
To answer this question, we will analyse the given options one by one.
Option A: Wood
Wood is a naturally occurring substance and acts as a good source of fuel when used efficiently. Also, on its decomposition in the absence of oxygen, it produces a mixture of gases like methane and carbon dioxide, or simply biogas. Hence, it can be used as a biogas source of energy.

Option B: Gobar
Gobar, or cow dung, is also used as a fuel, or a source of energy, in several areas of our country. It is a naturally occurring substance and can be used efficiently as a biogas source of energy.

Option C: Nuclear Energy
Nuclear Energy, as we all know, uses radioactive substances to produce energy. It is not environment-friendly. Hence, it is not an example of a biogas source of energy.

Option D: Coal
Coal is another example of a biogas source of energy. It can be used efficiently to produce biogas.

Hence, option C is the answer.

Note: You may need to memorize the example of sources of biogas and their reactions. Some of the common examples like coal, wood, gobar have been given in this question. memorising them makes it easier to solve questions like these and saves time.