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Question

Iron (II) oxide is written as ¯¯¯¯¯¯¯¯¯¯¯FeO. What does it mean?

A
Fully pure
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B
Impure
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C
Ratio of Fe and O is 1:1
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D
None of these
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Solution

The correct option is B Impure
Impurity defects are foreign atoms that replace some of the atoms making up the solid or that squeeze into the interstices; they are important in the electrical behaviour of semiconductors, which are materials used in computer chips and other electronic devices.
An example of interstitial impurity atoms is the carbon atoms that are added to iron to make steel.

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