the substances which undergo chemical change are called??????????
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reactants
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The following can indicate that a chemical change has taken place, although this evidence is not conclusive: Change of odor. Change of color (for example, silver to reddish-brown when iron rusts). Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat.
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reactants are the substances which undergo reaction
and products are the substances which are formed after any chemical reaction
and products are the substances which are formed after any chemical reaction
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