Any article of iron if left in open for some time, acquires a film of brownish substance (rust) having chemical formula:
$F e_{3} O_{4}$
$F e_{2} O_{3}$
$F e (O H)_{2}$
FeO

FeO

F e (O H)_{2}

F e_{3} O_{4}

F e_{2} O_{3}

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Solution

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Iron reacts with air to form iron oxide(III) which is known by the name rust or rusting of iron. Rust is an iron oxide or red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Rust consist of hydrated iron oxide.

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Any article of iron if left in open for some time, acquires a film of brownish substance (rust) having chemical formula:

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(1)

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
(a) Do you think rust is different from iron?

(2)

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

(b) Can you change rust back into iron by some simple method?

(3)

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

(4)

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

(d) Give two other examples of a similar type of change.

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Statement I: If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

Statement II: Rusting of iron is a chemical change.

View Solution

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

(a) Do you think rust is different from iron?

(b) Can you change rust back into iron by some simple method?

(c) Do you think the formation of rust on iron is a chemical change?

(d) Give two other examples of a similar type of change.

View Solution

Question 21

If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
(a) Do you think rust is different from iron?
(b) Can you change rust back into iron by some simple method.
(c) Do you think formation of rust from iron is a chemical change?
(d) Give two other examples of a similar type of change.

View Solution

Any article of iron if left in open for some time, acquires a film of brownish substance (rust) having chemical formula:Fe3O4Fe2O3Fe(OH)2FeO

Iron reacts with air to form iron oxide(III) which is known by the name rust or rusting of iron. Rust is an iron oxide or red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Rust consist of hydrated iron oxide.

Any article of iron if left in open for some time, acquires a film of brownish substance (rust) having chemical formula:
$F e_{3} O_{4}$
$F e_{2} O_{3}$
$F e (O H)_{2}$
FeO