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Arrange simple, body-centred and face-ce...

Arrange simple, body-centred and face-centred cubic unit cells in order of their increasing packing efficiencies, and give reasons.

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CHHAYA PUBLICATION-SOLID STATE-EXERCISE
  1. An ionic solid M(x)A(y) has a cubic unit cell with M^(y+) ions at its ...

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  2. Mention two differences between Schottky and Frenkel defects.

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  3. Arrange simple, body-centred and face-centred cubic unit cells in orde...

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  4. What are non-stoichiometric defects? Give two example of such defects.

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  5. Why aren't Frenkel defects observed in pure halides of alkali metals?

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  6. Why does KCl become violet in colour when it is heated in presence of ...

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  7. What do you understand by a tetrahedral void in a close-packed structu...

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  8. What do you understand by an octahedral void in a close-packed crystal...

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  9. Metallic Zn has a hexagonal close-packed array of Zn atoms. How many v...

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  10. What type of semiconductor (n-or p-type) is formed when pure Ge is dop...

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  11. What type of semiconductor (n- or p-type) is formed when pure Si is do...

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  12. Why does the electrical conductivity of semiconductors increase with r...

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  13. Why is the electrical conductivity of metals found to decrease with ri...

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  14. Why does the electrical conductivity of germanium crystal increase whe...

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  15. Write the differences between crystalline and amorphous solids.

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  16. On the basis of the nature of constituent particles, how are crystalli...

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  17. Between square and hexagonal close packing in two dimensions, which on...

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  18. Define: (i) Cubic close-packed structure (ii) Hexagonal close-packed s...

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  19. Show that 26% of the total volume of a face-centred cubic unit cell re...

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  20. Show that the number of octahedral voids in a ccp or an hcp structure ...

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