Anaerobic bacteria digest animal waste and produce biogas. The biogas is then burnt as fuel. Explain what kind of changes are these

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Solution

In biogas, the chemical energy is converted biologically (anaerobic bacteria) to electrical and heat energy. The gases methane hydrogen and carbonmonoxide combusted with oxygen and these energy is converted to heat and electricity. Here the changes are chemical changes

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Similar questions

Q. Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.

Anaerobic bacteria digest animal wastes and produces biogas (change=A) . The biogas is then burnt as fuel (change=B) . The following stamens pretain to these changes . Choose the correct one :

(a) A is a chemical change (b) B is a chemical change

(d) A and B are physical changes.

Q. Question 12
Anaerobic bacteria digest animal waste and produce biogas (Change –A). The biogas is then burnt as fuel (Change –B). The following statements pertain to these changes. Choose the correct one.
Which of the above changes is/are chemical change(s)?
(i) Process – A is a chemical change.
(ii) Process – B is a chemical change.
(iii) Both processes A and B are chemical changes.
(iv) None of these processes is a chemical change

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