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)?

None of these processes is a chemical change.

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Process – A is a chemical change.

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Both processes A and B are chemical changes.

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Process – B is a chemical change.

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Solution

The correct option is C Both processes A and B are chemical changes.
Both processes A and B are chemical changes.
As in both cases, there are new substances forming after the process.

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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.

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

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.

Question 11

State whether the following statements are true or false:

(a) When a candle burns, both physical and chemical changes take place.
(b) Anaerobic bacteria digest animal waste and produce biogas.
(c) Ships suffer a lot of damage though they are painted.
(d) Stretching of rubber band is not a physical change.

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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)?

The correct option is C Both processes A and B are chemical changes.Both processes A and B are chemical changes. As in both cases, there are new substances forming after the process.

The correct option is C Both processes A and B are chemical changes.
Both processes A and B are chemical changes.
As in both cases, there are new substances forming after the process.