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Why is FeO (s) not formed in stoichiometric composition? - Chemistry

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प्रश्न

Why is FeO (s) not formed in stoichiometric composition?

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उत्तर

In the crystals of FeO, some of the Fe2+ cations are replaced by Fe3+ ions. Three Fe2+ ions are replaced by two Fe3+ ions to make up for the loss of positive charge. Eventually there would be less amount of metal as compared to stoichiometric proportion.

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पाठ 1: Solid States - Exercises [पृष्ठ १०]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 1 Solid States
Exercises | Q III. 58. | पृष्ठ १०

संबंधित प्रश्‍न

Explain the following term with a suitable example:

Interstitials


Give reasons : In stoichiometric defects, NaCl exhibits Schottky defect and not Frenkel defect.


Out of NaCl and AgCl, which one shows Frenkel defect and why? 


Answer the following question.
What type of stoichiometric defect is shown by ZnS and why?


Ionic solids containing large differences in sizes of ions show ____________.


Dislocation defect is also known as ____________.


Frenkel defects are not found in alkali metal halides because ____________.


Type of stoichiometric defect shown by AgBr is ____________.


The following diagram shows:


Which is not correct about the Schottky defects?


Assertion: No compound has both Schottky and Frenkel defects.

Reason: Both defects change the density of the solid.


Assertion: Due to Frenkel defect, there is no effect on the density of the crystalline solid.

Reason: In Frenkel defect, no cation or anion leaves the crystal.


Which of the following crystals does not exhibit Frenkel defect?


Silver halides generally show:


In a Schottky defect ____________.


Which of the following point defects are shown by AgBr(s) crystals?

  1. Schottky defect
  2. Frenkel defect
  3. Metal excess defect
  4. Metal deficiency defect

Which of the following defects is also known as dislocation defect?


Schottky defect is noticed in ______


Given below are two statements:

Statements I: Frenkel defects are vacancy as well as interstitial defects.

Statements II: Frenkel defect leads of colour in ionic solids due to the presence of F-centers.

Choose the most appropriate answer for the statements from the options given below:


The incorrect statement about the imperfections in solids is ______.


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