Table of Contents
Is folding paper reversible or irreversible?
Reversible: Things or processes which can be reversed are called reversible. For example, a folded sheet of paper can be unfolded and hence folding a sheet of paper is reversible. Irreversible: Things or processes which cannot be reversed are called irreversible.
Why is folding paper reversible?
SOLUTION: (i) Folding of a paper is a reversible change because paper can be unfolded to get it back. (ii) Burning of paper is an irreversible change because we cannot get back the paper after burning it.
Is folding paper a physical change?
The folding of paper is a physical change. Paper is made up of cellulose molecules. Folding the paper does not alter the structure of cellulose. Any action which alters the structure of cellulose will be called a chemical change.
What happens if you fold a paper?
It’s just a matter of math, really. Fold an A4 once and it will be twice as thick, fold it again and it will be four times as thick as it initially was. Turns out, according to Dr Karl Kruszelnicki, if you do this 103 times the sheet’s thickness will be larger than the observable Universe: 93 billion light-years.
Why cutting of paper is an irreversible change?
In case of irreversible change, the changed substance cannot be send back to its original state. Here cutting of paper is an example of irreversible change. Once we cut a paper into smaller pieces, it is impossible to get back the whole original size of paper.
Which of the following change Cannot be reversed?
Which of the following changes cannot be reversed? Solution: (a) Hardening of cement is an irreversible change. Changes that cannot be reversed are called irreversible changes.
Which of these is an irreversible change?
Some examples of irreversible changes are burning of paper, Burning of fuels (like Wood, Coal and LPG), Cooking of food, Rusting of iron , Grinding of wheat grains into flour, Baking of chapatti (roti), Growth of a plant, Formation of flower from bud, Falling of leaves from a tree, Ripening of fruits, Ageing of man and …
Can all changes always be reversed?
Nope…… only physical changes can be reversed,chemical changes are irreversible..