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Define radius ratio....

Define radius ratio.

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Ratio of radius of cation to the radius of anion.
OR
Radius ratio `= (r^(+))/(r^(-))`
`r^(+)` = radius of cation
`r^(-)` = radius of anion.
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OSWAAL PUBLICATION-SOLID STATE-TOPIC -2 (VERY SHORT ANSWER TYPE QUESTIONS )
  1. Name the crystal defect which lowers the density in an ionic crystal

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  2. What is Frenkel defect? Give an example.

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  3. Define radius ratio.

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

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  5. What are paramagnetic materials ? Give examples.

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  6. Define ferromagnetism.

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

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

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

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

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

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

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

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

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

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

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

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

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  19. What are n-type semiconductors ?

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  20. Which type of substance wxhibit anti ferromagnetism ?

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