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Na and Mg crystallize in bcc- and fcc-ty...

`Na` and `Mg` crystallize in bcc- and fcc-type crystals, respectively, then the number of atoms of `Na` and `Mg` present in the unit cell of their respective crystal is

A

4 and 2

B

9 and 14

C

14 and 9

D

2 and 4

Text Solution

Verified by Experts

The correct Answer is:
D
bcc has atoms at corner and body centre . Hence , total number of atoms = 2 and in fcc, atoms are present at corner and faces hence, total number of atoms = 4
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-SOLID STATE-EXERCISE 1
  1. What is the total number of atoms per unit cell in a face centred cubi...

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  2. Sodium metal crystallises in body centred cubic lattic with cell edge ...

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  3. Na and Mg crystallize in bcc- and fcc-type crystals, respectively, the...

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  4. If a is the length of the side of a cube, the distance between the bod...

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  5. The number of hexagonal faces that are present in a truncated octahedr...

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  6. The number of atoms contained in a fcc unit cell of a monoatomic subst...

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  7. Number of unit cells in 4g of X(atomic mass=40). Which crystallises in...

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  8. Match the following Choose the correct option

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  9. What is the coordination number of each atom in a hexagonal close-pack...

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  10. At the limiting value of radius ration (r^+)/(r^-)

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  11. The NaCl structure can be converted into CsCl structure

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  12. If the crystallises in zinc blende structure with I^- ions at lattice ...

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  13. In which pair most efficient packing is present?

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  14. In which of the following packing 74% space is occupied by the atoms w...

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  15. When the centres of the four immediate neighbouring spheres are joine...

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  16. If the number of close packed sphere be N, then the number of octahedr...

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  17. While placing the second layer over that first layer , if the sphere o...

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  18. In an antiflourite structure, cations occupy

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  19. The numbers of tetrahedral and octahedral holes in a ccp array of 100 ...

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  20. The total number of octahedral void (s) per atom present in a cubic cl...

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