What is chemical change??? Give two example of phisical and chemical change!
Answers
ANSWER:-
A chemical change produces a new substance. It brings a change in the chemical composition of a substance.
egs for chemical change:-combustion (burning), cooking an egg, rusting of an iron pan
egs for physical change:-Ice melting involves a change from a solid to a liquid and the substances maintain the properties of water because the molecules never change.
Answer:
A change which can't be reversed and its colour or state is changed after the change is called chemical change.
Ex of chemical change - burning of a paper (it's colour and state is changed)
and burning of candle (it's thread is burned and thus it's state changed)
Ex of physical change - breaking of glass (it's state is not changed and it can be reversed)
and on and off of tubelights (it can be on and off again and again)
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