physical change and chemical change
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physical change : the changes in which no new substances are formed is known is physical change.
ex : boiling of water , condensation of steam
Chemical change :the changes in which new substances are formed are called chemical change.
ex : burning of paper , rusting of iron
ex : boiling of water , condensation of steam
Chemical change :the changes in which new substances are formed are called chemical change.
ex : burning of paper , rusting of iron
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physical chnges r temporary and usually reversible in nature.
chemicl chngs r permanent and usually irreversible in nature.
chemicl chngs r permanent and usually irreversible in nature.
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