Question

2. Differentiate between a physical change & a chemical change with reference to -
a] Nature of change i.e. temporary & reversible or permanent & irreversible.
b] Formation of products,
c) Energy change taking place during the respective change.
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Answer 1

Answer:

Physical Change— A physical change is a temporary change in which no new substance is formed and chemical composition remains same. ... Chemical Change— A chemical change is a permanent change, in which a new substance is formed whose chemical composition and physical properties are different, e.g. Burning of a candle.