Answer:
Explanation: The coal burning as well as copper roof turning green are examples of chemical change
1 .coal burning is a chemical change:
Reason: When coal burns the carbon present in coal reacts with oxygen in order to produce carbon-dioxide resulting in chemical change.
2.copper roof turning green is a chemical change:
Reason: when iron is kept in air it corrodes easily and forms a orange-red
outer layer similarly, when copper is exposed in the air it undergoes various chemical reaction due to which it turns green.
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Answer:
Explanation: The coal burning as well as copper roof turning green are examples of chemical change
1 .coal burning is a chemical change:
Reason: When coal burns the carbon present in coal reacts with oxygen in order to produce carbon-dioxide resulting in chemical change.
2.copper roof turning green is a chemical change:
Reason: when iron is kept in air it corrodes easily and forms a orange-red
outer layer similarly, when copper is exposed in the air it undergoes various chemical reaction due to which it turns green.