Question

which of these show reversible changes and why a) a burning candle b)an extinguished candle c) melting candle

Answer 1

heya!!

First of all, which changes can be called reversible and irreversible changes -

> Irreversible changes are changes which can't be turned back or they're permanent changes.

> Reversible changes can be reversed back again and they can be called as temporary.

Now returning back to your question,

Which of these show reversible changes and why?

a) a burning candle - Its an irreversible change as burning can't be undone.

b) an extinguished candle - Its a reversible change as an extinguished candle can be lightened again.

c) melting wax - Its also a reversible change as the melted wax can be turned to solid again.

hope it helps!!