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प्रश्न
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.
विकल्प
Process – A is a chemical change.
Process – B is a chemical change.
Both processes A and B are chemical changes.
None of these processes is a chemical change.
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उत्तर
Both processes A and B are chemical changes.
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संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer
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- oxygen
- chlorine
- hydrogen
- none of these
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Name the type of chemical reaction shown by the following equation:
CaCO3 → CaO + CO2
Define an electrochemical reaction.
Give a chemical test to distinguish between the following gases.
H2 and CO2
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Zinc carbonate.
Beating an egg to make a cake is a ______.
Acid rain is a result of ______.
