Question

What is meant by a chemical reaction ? Explain with the help of an examp
to) Give one example each of a chemical reaction characterised by
to evolution of a gas
c) change in colour
) formation of a predpitate
change in temperature
(w) change in state​

Answer 1

Answer:

change in state

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Answer 2

It is a process in which one pr more substance formed new substances and it cannot be reserved by physical method .  example of chemical reaction ---Rusting of iron .   Digesting of food etc .

   Explanation:

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