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For a face-centred cubic crystal of an e...

For a face-centred cubic crystal of an element , prove that radius (r) of the atoms is related to the edge (a) as `r=a//2sqrt2`

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In a face centred cubic unit cell of close packed atoms, the radius of atom (r) is related to the edge length (a) of the unit cell by the expression

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PRADEEP-STATES OF MATTER: SOLID MATTER-ADDITIONAL QUESTIONS ( SHORT ANSWER )
  1. Define radius-ratio . What is the coordination number if the radius ra...

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  2. Define radius ratio. What is the value of radius ratio for octahedral ...

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  3. For a face-centred cubic crystal of an element , prove that radius (r)...

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  4. For a body-centred cubic, crystal of an element , derive the relations...

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  5. Derive an expression for the calculation of density of the cubic cryst...

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  6. Explain how can you determine the atomic mass of an unknown metal if y...

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  7. What are point defects ? Describe Schottky defects in crystals.

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  8. Write the difference between Frenkel and Schottky defects.

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  9. Frenkel and Schottky defects are:

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  10. What are interstitials ? Explain with suitable examples

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  11. Briefly explain what you understand by 'F-centre' ?

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  12. Pure silicon is an insulator . Silicon doped with phosphorus is a semi...

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  13. Explain Schottky defect in Stoichiometric crystals. What are the conse...

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  14. What do you understand by imperfections in ionic crystals? Name the ty...

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  15. Explain the term 'Doping'

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  16. State the difference between Schottky and Frenkel defects ? Which of t...

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  17. How would you account for the following ? (i) Frenkel defects are no...

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  18. What is a semiconductor? Describe the two main types of semiconductor ...

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  19. What is doping ? What are n-type and p-type semiconductors ?

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  20. Solids can be classified into three types on the basis of their electr...

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