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Q.

An explosion of fireworks is a _____change.

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a

Chemical

b

Periodic

c

Physical

d

Natural

answer is B.

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Detailed Solution

The change in which the molecular composition is completely altered and a new product is formed is called a chemical change. 

The explosion of fireworks such as a cracker releases a lot of energy with the evolution of heat, light, and sound along with the production of gaseous products. Completely new substances are formed in this process. Hence, it is a chemical change.
 

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