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If 'a' stands for the edge length of the...

If 'a' stands for the edge length of the cubic systems: simple cubic, body centered cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively. 2. 

A

`1/2 a:sqrt(3a):(1)/sqrt(2)a`

B

`1/2 a:sqrt(3a)/(2)a:sqrt(2)/sqrt(2)a`

C

`1/2 a:sqrt(3a):sqrt(2)a`

D

`1/2 a:sqrt(3a)/(4):(1)/(2sqrt(2))a`

Text Solution

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The correct Answer is:
D
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AAKASH SERIES-SOLID STATE-OBJECTIVE EXERCISE -3
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  2. Which of the following statements is not correct?

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  3. The fraction of the total volume occupied by the atoms present in a si...

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  4. If 'a' stands for the edge length of the cubic systems: simple cubic, ...

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  5. Percentage of free space in a body-centred cubic unit cell is

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  6. Lithium metal crystallizes in a body-centred cubic crystal. If the len...

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  7. AB crystallises in a bcc lattice with edge length ‘a’ equal to 387 pm....

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  8. When molten zinc is cooled to solid state, it assumes HCP structure. T...

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  9. The number of octahedral voids in a unit cell of cubic close packed st...

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  10. A metal crystallizes with a face-centred cubic lattice. The edge of th...

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  11. Structure of a mixed oxide is cubic close-packed (ccp). The unit cell ...

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  12. A metal has fcc lattice. The edge length of the unit cell is 404 pm. T...

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  13. The number of carbon atoms per unit cell of diamond unit cell is

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  14. If ‘a’ is the length of the side of a cubic unit cell the distance bet...

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  15. A given metal crystallises out with a cubic structure having edge leng...

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  16. The vacant space in bcc lattice unit cell is

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  17. Lithium has a bcc structure. Its density is 530 kg n r3 and its atomic...

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  18. The ionic radii of A^(+) and B ions are 0.98 xx 10^(-10)m and 1.81 xx ...

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  19. Which is the incorrect statement?

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  20. Iron exhibits bcc structure at room tempera­ture. Above 900^(@)C, it t...

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