Question

why chemical changes are not reversed

Answer 1

Hi,
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Here is your answer,
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The main fact behind it is that in chemical changes the chemical properties get changed.
Additional information :
Chemical changes can be reversed by little applying heat and pressure, but generally thee are irreversible.
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HOPE YOU WILL UNDERSTAND MY WORDS, a request is here please as I am an ACE ranker I wish that to make my way easy for the GENIUS rank you should mark my answer brainlest if you wish then only ☺.
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Answer 2

1. Gas cannot be converted to solid