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Q.

Is it true that the changes in which chemical reactions are involved, are known as chemical changes and the changes in which no chemical reactions are involved, are known as physical?


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a

True

b

False  

answer is A.

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Detailed Solution

The above statement is True.
Physical change is only temporary. A chemical change is irreversible. A physical change only affects physical properties such as shape, size, and so on. Chemical alters the physical and chemical properties of a substance, as well as its composition. A physical change requires little to no energy absorption.
 
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