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Why is Fe3O4 becomes paramagnetic at 850...

Why is `Fe_3O_4` becomes paramagnetic at 850 K?

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ASSAM ACADEMIC CENTRE-Solid State -Example
  1. Explain the following with suitable examples: Paramagnetism

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  2. Explain the following with suitable examples: Ferromagnetism

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  3. Explain the following with suitable examples: Antiferromagnetism

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  4. Explain the following with suitable examples: 12-16 and 13-15 group co...

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  5. State the difference between Schottky and Frenkel defects.

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  6. Why phosphorus doped with silicon is a semiconductor?

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  7. Some of the glass objects recovered from ancient monuments look milky ...

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  8. Schottky defect lowers the density of a solid.

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  9. Frenkel defects are not found in alkali metal halides.

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  10. Why is Fe3O4 becomes paramagnetic at 850 K?

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  11. What are interstitials in a crystal?

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  12. What type of lattice imperfections are found in crystals?

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  13. Schottky defect lowers the density of the crystal but Frenkel defect d...

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  14. Which of these two, CdCl2 and NaCl, will produce Schottky defect, if a...

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  15. What are non-stoichiometric compounds?

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  16. Define dislocation in crystals.

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  17. Although pure silicon is an insulator, then how does it behave as a se...

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  18. Which point defect may lower the density of an ionic crystal?

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  19. What type of lattice imperfections are found in crystals?

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  20. On heating a crystal of KCl in potassium vapours, the crystal start ex...

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