defence exam Indian Army Nursing Assistant Mock Test Series 2025 General Science Chemistry Chemical Reaction
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.
1
Process – A is a chemical change.
2
Process – B is a chemical change.
3
Both processes A and B are chemical changes.
4
None of these processes is a chemical change.