eruption of volcano is a chemical change.

is it true or false

No,
It is generally considered as a physical change however some of the reactions of metals or minerals present in the volcano can react chemically but instead the whole volcano eruption is a physical change.

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It is true.

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NO. Although chemical changes can take place as a part of eruption , most of it is of physical change.

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it is true

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N0

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no, it is not chhemical change as we cannot reverse to make again volcano

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