Which of the following is an irreversible physical change?
Which of the following is an irreversible physical change?
The correct option is B Cutting of wood
Explanation for correct answer:-
Option (b) cutting of wood is the correct answer if you chop down a tree and cut it into a bunch of little pieces you can't put that tree back together so that it can continue living.
So, cutting wood is an irreversible change.
Explanation for incorrect answer:-
Option (a) melting of butter is a reversible physical change as if we freeze that molten butter it will get back to its initial state.
Option (c) freezing of water again is a reversible physical change as water is changing its physical state from liquid to solid. If we put heat into it it will become water again.
Option (d) Stretching of a rubber band is a reversible physical change as the chemical components of the rubber band do not change while stretching and again it will get back to the initial state so a reversible change.
Therefore, Option (b) is correct, Cutting wood is an irreversible physical change.
Cutting of wood
Explanation for correct answer:-
Option (b) cutting of wood is the correct answer if you chop down a tree and cut it into a bunch of little pieces you can't put that tree back together so that it can continue living.
So, cutting wood is an irreversible change.
Explanation for incorrect answer:-
Option (a) melting of butter is a reversible physical change as if we freeze that molten butter it will get back to its initial state.
Option (c) freezing of water again is a reversible physical change as water is changing its physical state from liquid to solid. If we put heat into it it will become water again.
Option (d) Stretching of a rubber band is a reversible physical change as the chemical components of the rubber band do not change while stretching and again it will get back to the initial state so a reversible change.
Therefore, Option (b) is correct, Cutting wood is an irreversible physical change.
