chemical changes are , always irreversible, mostly irreversible, always reversible, mostly reversible, choose the irreversible change :, melting of ice, melting of wax, boiling of water, burning of wax, choose the reversible change :, milk turning into curd, burning of wax, melting of wax, rusting of iron, In which change is a new substance formed?, Tearing of a paper, Freezing of water, rusting of iron, Crushing a can, burning of wax is which kind of change ,  physical change, none of the given examples, reversible change , chemical change.

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