Question

list any three observation that determine that a chemical reaction has taken place also list free information that cannot be obtained about chemical reaction nearly by the chemical eqation

Answer 1

Three observations that determine that a chemical reaction has taken place are:-

*Evolution of gas.
*Change in colour.
*Change in state.


Information that can be obtained from chemical equation is:-

*States of reactants and products.
*The temperature and catalyst.
*Rate of chemical reaction.

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