Assertion (A) : Cutting of paper into very small pieces is an irreversible change. Reason (R) : Physical changes are always reversible.

Assertion (A) : The explosion of fire cracker is a physical change. Reason (R) : A physical change is a reversible change.

Assertion : The explosion of fire cracker is a physical change. Reason : A physical change is a reversible change.

Unlike physical changes, chemical changes cannot be easily reversed.

Assertion (A) : Burning of a candle is considered a physical as well as chemical change. Reason (R) : Melting of wax is a physical change melted wax turns into vapours and then burns which is a chemical change.

Assertion (A): Spontaneous process is an irreversible process and may be reversed by external agency Reason (R): Decrease in enthalpy is a contributory factor for spontaneity.

Assertion (A) : Copper is used to make electric wires. Reason (R) : Copper has very low electrical resistance.

Give an example to justify the statement that physical changes can be reversible as well as irreversible.

Anology: Irreversible change :Rusting of iron::Reversible change:____