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The density of chromium is 7.2 gm cm^(3)...

The density of chromium is 7.2 gm `cm^(3)` and crystallises in a body - centred cubic lattice with edge length 290pm. The number of atoms present in 30.0 gm of the sample is

A

`2.2 xx10^(23)`

B

`6xx10^(23)`

C

`3.4 xx10^(23)`

D

`9.1 xx10^(23)`

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-SOLID STATE-OBJECTIVE EXERCISE -2
  1. A metal has bcc structure and the edge length of its unit cell is 3.04...

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  2. In a metal oxide, oxide ions are arranged in hep array and the metal i...

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  3. The density of chromium is 7.2 gm cm^(3) and crystallises in a body - ...

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  4. Solid AB has the NaCZ structure. Atom A occupy the corners of the cubi...

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  5. In a solid AB having the NaCZ structure. ‘A’ atoms occupy the corners ...

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  6. A Binary solid has rocksalt structure The edge length is 400 pm and th...

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  7. In a crystalline solid, anions B are arranged in ccp lattice and catio...

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  8. The percentage of void space of a metallic element crystallising in a ...

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  9. A compound contains elements X and Y. Y atoms form CCP lattice and ato...

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  10. In a Face centered Cubic lattice, the packing fraction is

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  11. In a face centred cubic arrangement of A and B atoms whose A atoms are...

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  12. The number of atoms in HCP unit cell is

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  13. Edge length of a cube is 300 pm. Its body diagonal would be

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  14. The formula of an oxide of iron is Fe(0.93)O(1.00).  If the compound h...

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  15. If one mole of AgCZ is dopped with 10^(-5) mole of CaCl(2) then number...

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  16. If one mole of AgCl is dopped with 10^(-5) mole of AICI3, the number ...

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  17. NaCZ is doped with 2 xx 10^(-2) mole% of SrCl(2) then the number of ca...

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  18. A solid solution of CdBr(2) in AgBr contains

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  19. Schottky defect in crystals is observed when

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  20. Which among the following is likely to have Schottky defect.

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