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Permanent Change

of iron is ir...

Question

___________ of iron is irreversible change

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Solution

RUSTING of iron is irreversible change

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Q. Rusting of iron nail is
(a) reversible change
(b) irreversible change
(c) periodic change
(d) non-periodic change

Q. Which of these is an irreversible physical change?

(a) rusting of iron
(b) freezing of water
(c) a double decomposition reaction
(d) breaking of a glass tumbler

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Digestion of food is a Q irreversible change. ( )
2. Rusting of iron is a reversible change. ( )
3. Melting of wax is a reversible change. ( )
4. Curding of milk is an irreversible change. ( )
5. Melting of ice cream is a reversible change. ( )

A sheet of paper is used to make a paper boat. This is a ___ change. (reversible/irreversible)

Q. Give a reason, why?

A. Freezing of water is a reversible change while burning of a candle an irreversible change.

B. Change of seasons is a periodic change while the burning of weather is a non-periodic change.

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