Question

Burnt sparklers and burnt books pages are examples of
(A) reversible change
(B) irreversible change
(C) no change
(D) none of the above

Answer 1

Hint :Physical and chemical changes are the two forms of changes in matter. A physical change affects a substance's physical qualities, whereas a chemical change impacts its chemical qualities, as the names imply. Many physical changes (such heating and cooling) are reversible, but chemical changes are frequently irreversible or only reversible with another chemical change.

Complete Step By Step Answer:
When solely the physical attributes of a material change, such as its form, size, colour, condition, or appearance, it is said to experience a physical change. Its chemical make-up hasn't changed. The following are some features of a physical change:
The nature of the situation is temporary.
The internal structure of a material is unaffected; only the molecules are rearranged.
The majority of physical changes may be reversed. Even after the alteration, we can get the content back.
There is no new material generated.
When the chemical characteristics of a substance change, it is said to have undergone a chemical transformation. As a result, atomic bonds are either formed or broken at the molecular level. The following are some features of a chemical change:
Permanent in nature.
One or more new substances are generated when the original makeup of the material changes.
Heat, light, and electricity are examples of energy that may be emitted or absorbed.
In most cases, a chemical alteration is irreversible. It cannot, at the very least, be reversed via basic physical means.
Irreversible modifications, such as burned sparklers and burned book pages, are permanent modifications that cannot be reversed. The original materials cannot be retrieved once these materials have been reduced to ashes.
Hence option C is correct.

Note :
Burning paper, burning fuel, rusting iron, sour milk, development in a living creature, cooking, food digestion, and wood burning are all examples of chemical changes.
Folding a paper sheet, melting wax, freezing and boiling water, melting ice, condensation, vaporisation, magnetising a compass needle, and dissolving sugar in water are all instances of physical changes.