A black material called tar is used for repairing roads. What type of change occurs
in tar on heating?
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Answer:
it will excess CO2 and it is very harmful
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Coal tar is a black,solid material which is used in making and repairing roads. When coal tar is heated,it melts to form a thick black liquid.The melting of coal tar on heating is a revisible change because when hot,molten coal tar gets cooled,it solidifies again.
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