which of the following statement is/ are true?
a) the total mass of the substance remains same in a chemical change
b) a chemical change is permanent and irreversible
c) a physical change is temporary and reversible
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Answered by
1
Answer:
my answer is B(a chemical change is permanent and irreversible
Answered by
1
Answer:
b.....I think sooo that it is not necessary it is permanent and it can be converted using some catalyst
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