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In Zns structure S^(-2) ions make FCC la...

In Zns structure `S^(-2)` ions make FCC lattice in which `Zn^(+)` occupies alternate tetrahedral voids. `CIW CaF_(2)` structure `Ca^(+2)` ions make FCC lattice and `F^(-)` ions occupy all the tetrahedral voids.
How many Zns formula with are present per unit cell?

A

1

B

2

C

3

D

4

Text Solution

Verified by Experts

The correct Answer is:
D
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In Zns structure S^(-2) ions make FCC lattice in which Zn^(+) occupies alternate tetrahedral voids. CIW CaF_(2) structure Ca^(+2) ions make FCC lattice and F^(-) ions occupy all the tetrahedral voids. One mole each of Zns and CaF_(2) are taken. What is the ratio of number of unitcells in the sample ?

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AAKASH SERIES-SOLID STATE-PRACTICE SHEET - 5
  1. Which planes can be found in a bcc unit cell?

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  2. Which planes can be found in fluorite structure (unit cell)?

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  3. Which planes are present in Na(2)O structure (unit cell)

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  4. Which of the following solids fuse at modulate temperature ?

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  5. Which systems have more than one unit cell ?

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  6. Which statements are correct ?

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  7. Rocksalt structure consists of FCC arrangment of Cl^(-) ions in which ...

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  8. Rocksalt structure consists of FCC arrangment of Cl^(-) ions in which ...

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  9. Rocksalt structure consists of FCC arrangment of Cl^(-) ions in which ...

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  10. In Zns structure S^(-2) ions make FCC lattice in which Zn^(+) occupies...

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  11. In Zns structure S^(-2) ions make FCC lattice in which Zn^(+) occupies...

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  12. If CaF(2) structure the nearest inter cationic distance in 'x' what is...

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  13. Match the following : {:("COLUMN - I","COLUMN - II"),("A) ABAB ........

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  14. Match the following : {:("COLUMN - I","COLUMN - II"),("A) 'Na' vapou...

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  15. How many unit crystal systems contain only one unit cell ?

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  16. What is the maximum number of unit cells may be present in any crystal...

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  17. '5x' percent of ion pairs are missing from an 'MX' crystal with FCC st...

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  18. A metal exists in 'hep' and 'ccp allotropic forms. The density of 'hcp...

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  19. In an oxide Ore half of tetrahedral voids are occupied by A^(+x) ions ...

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  20. 10 moles of NaF and 10 moles of AlF(3) are mixed and uniformly recryst...

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