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When molten zinc is cooled to solid stat...

When molten zinc is cooled to solid state, it assumes HCP structure. Then the number of nearest neightbours of zinc atom will be

A

4

B

6

C

5

D

12

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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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