Question

Chemucal change where heat light and sound

Answer 1

Chemical change where heat light and sound is involved.
Ans. Busting Of Crackers
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Answer 2

Chemical reactions usually involve a change in appearance (e.g. colour) or a detectable energy change (e.g. involving heat, light or sound). All chemical reactions involve the formation of one or more new substances. Change in appearance. Rusting involves shiny, grey coloured iron becoming red and crumbly iron oxide.