What is the meaning of a chemical reaction as per the textbook?

What is the meaning of a chemical reaction as per the textbook?
a) A process in which the shape of a substance changes
b) A process in which substances undergo a chemical change
c) A process that does not involve any change in properties
d) A reaction where physical properties remain unchanged
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Class X Class X Science

Answers 1

b) A process in which substances undergo a chemical change
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