Rusting of iron can be identified by change in it-s-volumecolourstateshape

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Standard VII

Chemistry

Changes Around Us

Rusting of ir...

Question

Rusting of iron can be identified by change in it's:

shape

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volume

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colour

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state

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Solution

The correct option is C colour
During rusting, a brown coloured layer is formed on the surface of the iron. This change in colour indicates that iron has been rusted.
However, no change in shape, volume and state take place during rusting of iron.

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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.

Q. Rusting of iron can be identified by change in its:

Rusting of iron is a chemical change and chemical change is a permanant changes occur but we can remove the rust of iron by coating or painting than how it is a chemical change not a physical change?

Q. Iron can be protected from rusting by coating with zinc. How does it prevent oxidation of iron?

Rusting of iron can be prevented by:

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Rusting of iron can be identified by change in it's:

The correct option is C colourDuring rusting, a brown coloured layer is formed on the surface of the iron. This change in colour indicates that iron has been rusted. However, no change in shape, volume and state take place during rusting of iron.

The correct option is C colour
During rusting, a brown coloured layer is formed on the surface of the iron. This change in colour indicates that iron has been rusted.
However, no change in shape, volume and state take place during rusting of iron.