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What are paramagnetic materials ? Give e...

What are paramagnetic materials ? Give examples.

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Paramagnetic materials : These materials are attracted by magnetic fields. They contain permanent magnetic dipoles due to presence of atoms, ions or molecules with unpaired electrons. Eg, `O_(2), Cu^(2+), Fe^(2+) and Cr^(3+)` etc. The magnetic dipoles are represented by arrows.
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OSWAAL PUBLICATION-SOLID STATE-TOPIC -2 (VERY SHORT ANSWER TYPE QUESTIONS )
  1. Define radius ratio.

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  2. Mention one property which is caused due to the presence of F-centre i...

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  3. What are paramagnetic materials ? Give examples.

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  4. Define ferromagnetism.

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  5. Which point defect decreases the density of a solid ?

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  6. Express the relationship between atomic radius (r) and edge length (a)...

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  7. What type of stoichiometric defect is shown by AgCl ?

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  8. What type substances would make better permanent magnets, ferromagneti...

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  9. On heating a crystal of KCl in potassium vapour, the crystal starts ex...

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  10. Which type of ionic substances show Schottky defect in solids ?

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  11. What is meant by 'doping' in a semiconductor ?

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  12. How is the conductivity of an intrinsic semiconductor be increased ?

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  13. Which stoichiometric defect increases the density of a solid ?

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  14. What type of stoichiometric defect is shown by AgBr and AgI ?

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  15. What type of defect can arise when a solid is heated ?

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  16. Why does LiCl acquire pink colour when heated in Li vapours ?

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  17. What are n-type semiconductors ?

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  18. Which type of substance wxhibit anti ferromagnetism ?

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  19. What type of semiconductor is obtained when silicon is doped with arse...

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  20. Give an example of an ionic compound which shows Frenkel defect.

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